Repository: objective-see/ProcInfo Branch: master Commit: ec51090fcf74 Files: 16 Total size: 122.3 KB Directory structure: gitextract_1b4co5mo/ ├── .gitattributes ├── .gitignore ├── LICENSE.md ├── README.md ├── lib/ │ ├── libprocInfo.a │ └── procInfo.h ├── procInfo/ │ ├── Binary.m │ ├── Consts.h │ ├── Process.m │ ├── ProcessMonitor.m │ ├── Signing.h │ ├── Signing.m │ ├── Utilities.h │ └── Utilities.m └── procInfo.xcodeproj/ ├── project.pbxproj └── project.xcworkspace/ └── xcshareddata/ └── IDEWorkspaceChecks.plist ================================================ FILE CONTENTS ================================================ ================================================ FILE: .gitattributes ================================================ # Auto detect text files and perform LF normalization * text=auto ================================================ FILE: .gitignore ================================================ # Xcode # # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore ## Build generated build/ DerivedData/ ## Various settings *.pbxuser !default.pbxuser *.mode1v3 !default.mode1v3 *.mode2v3 !default.mode2v3 *.perspectivev3 !default.perspectivev3 xcuserdata/ ## Other *.moved-aside *.xcuserstate ## Obj-C/Swift specific *.hmap *.ipa *.dSYM.zip *.dSYM # CocoaPods # # We recommend against adding the Pods directory to your .gitignore. 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Copyright (C) This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: Copyright (C) This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read . ================================================ FILE: README.md ================================================ # ProcInfo Proc Info is a open-source, user-mode, library for macOS. It provides simple interface to retrieve detailed information about running processes, plus allows one to asynchronously monitor process creation & exit events. Love this library or want to support it? Check out my [patreon page](https://www.patreon.com/objective_see) :) ##### Quick Start (tl;dr) To use the Proc Info library: 1. add the Proc Info library (`lib/libprocInfo.a`) and Apple's OpenBSM library (`libbsm.tbd`) to your Xcode Project 2. import the Proc Info library header file (`procInfo.h`) 3. instantiate a `Proc Info` object 4. a) to retrieve information about a running process invoke the `init:` method
b) to enumerate existing processes invoke the `currentProcesses` method
c) to monitor process events, declare a callback block and invoke the `start:` method
...or just download the [demo project](https://github.com/objective-see/ProcInfoExample), to take it for a spin! ```Objective-C #import "procInfo.h" //init proc info object // YES: skip (CPU-intensive) generation of code-signing info // NO: automatically generate code-signing info for each process ProcInfo* procInfo = [[ProcInfo alloc] init:NO]; //dump process info for process 1337 NSLog(@"process: %@", [[Process alloc] init:1337]); //dump process info for all processes for(Process* process in [procInfo currentProcesses]) NSLog(@"new process: %@", process); //block for process events ProcessCallbackBlock block = ^(Process* process) { if(process.type != EVENT_EXIT) NSLog(@"process start: %@\n", process); else NSLog(@"process exit: %d\n", process.pid); }; //start monitoring // ->block will be invoke upon process events! [procInfo start:block]; ``` ##### Details The Proc Info library provides an interface to: + retrieve information about arbitrary processes (by pid) + retrieve information about all running processes + monitor for process start & exit events The library is already used in various Objective-See's tools that: + need to track process creation events (e.g. RansomWhere? BlockBlock, etc) + classify running processes (based on their cryptographic signatures) Moreover, it is an important component of tools designed to facilitate Mac malware analysis (e.g. [OSX/FruitFly](https://speakerdeck.com/patrickwardle/fruitfly-via-a-custom-c-and-c-server)), and vulnerability hunting (e.g. [Installers/Updaters](https://speakerdeck.com/patrickwardle/defcon-2017-death-by-1000-installers-its-all-broken)). As detailed in the 'Quick Start' section, to use Proc Info in your Xcode project perform the following steps. **1. Add the Proc Info library to your Xcode project:**
To add the Proc Info library to your Xcode project simply drag and drop the library (`lib/libprocInfo.a`), into the File Navigator. In the resulting 'file add' popup, make sure the 'Copy items if needed' option is selected:

**2. Add Apple's OpenBSM library to your Xcode project:**
Select your project in Xcode, then click on the 'Build Phases' tab. In the 'Link Binary With Libraries' section, click the '+' to bring up the prompt for adding frameworks and libraries. Type `bsm` in the search box. Then select `libbsm.tbd` and click 'Add':

**3. Add the 'Proc Info' library header file to your project:**
In Xcode click, 'File' then 'Add Files to ' Browse to the location of the `procInfo.h` header file, and click 'Add.' Note, you can also add the `procInfo.h` file into your project simply by dragging and dropping it into Xcode. Your Xcode project should now look something like this:

Hit Product->Build to compile and link your project. Assuming it cleanly builds, now it's time to start writing code to unlock the power of the Proc Info library :) Before getting into coding specifics, its important to understand the `Process` and `Binary` objects. A `Process` object represents a instance of a running process. Looking at the header file `procInfo.h` one can see it contains information about the process such as: + pid + ppid + user + ancestors + arguments Each `Process` object also has an associated `Binary` object that represents the on-disk image of the main executable which backs the process. The 'Binary' object contains information such as: + name + full path + file attributes + signing information The signing information includes: + signing status + signing authorities + whether its an Apple binary + from the app store With this information, one can use the library to answer questions such as: + *"What are all running processes on my system that don't belong to Apple proper?"* + *"What are the arguments of the process that was just spawned?"* + *"Is that process from the Mac App Store?"* + ...and many more! **Retrieving Information about an Arbitrary Process:** Via the Proc Info library one can create `Process` objects for arbitrary processes. Simply invoke the `Process` `init:` method with the process identifier (`pid_t`) of a running process: ```Objective-C //init process obj Process* process = [[Process alloc] init:1337]; ``` This will create a `Process` object for the specified process, that will contain the aforementioned process characteristics (ancestors, arguments, `Binary` object, etc). You can directly access this (e.g. `process.binary.isApple`). Here, we simply dump it to `stdout` via `NSLog()`: ```Objective-C //dump process info NSLog(@"process: %@", process); //output process: pid: 1337 path: /Applications/Calculator.app/Contents/MacOS/Calculator user: 501 args: ( "/Applications/Calculator.app/Contents/MacOS/Calculator" ) ancestors: ( 557, 554, 353, 1 ) binary: name: Calculator path: /Applications/Calculator.app/Contents/MacOS/Calculator attributes: { NSFileCreationDate = "2017-03-23 00:27:11 +0000"; NSFileExtensionHidden = 0; NSFileGroupOwnerAccountID = 0; NSFileGroupOwnerAccountName = wheel; NSFileHFSCreatorCode = 0; NSFileHFSTypeCode = 0; NSFileModificationDate = "2017-03-23 00:27:11 +0000"; NSFileOwnerAccountID = 0; NSFileOwnerAccountName = root; NSFilePosixPermissions = 493; NSFileReferenceCount = 1; NSFileSize = 199520; NSFileSystemFileNumber = 92435925; NSFileSystemNumber = 16777220; NSFileType = NSFileTypeRegular; } signing info: { signatureStatus = 0; signedByApple = 1; signingAuthorities = ( "Software Signing", "Apple Code Signing Certification Authority", "Apple Root CA" ); } (isApple: 1 / isAppStore: 0) ``` **Retrieving Information about all Running Processes:** The Proc Info library can also provide information about all running processes via the `ProcInfo` object's `currentProcesses` method. This method returns an array of `Process` objects; one for each running process: ```Objective-C //enum all existing procs for(Process* process in [processInfo currentProcesses]) { //query/examine each process... //dump process info NSLog(@"process: %@", process); } ``` Note that this method may take a few seconds to execute, as generating and verifying the cryptographic signing information for all processes is somewhat time/CPU consuming. As such, it is recommended that you invoke this logic (i.e. the `currentProcesses` method) on a background thread. **Monitoring Process Start and Exit Events:** One of the most powerful features of the Proc Info library is its ability to asynchronously monitor for process events such as creation (`exec`, `spawn`, `fork`) and exit. When running with root privileges (recommended!) it uses Apple BSM auditing events to such process events. (For background on BSM auditing see ["OpenBSM auditd on OS X: these are the logs you are looking for"](http://ilostmynotes.blogspot.com/2013/10/openbsm-auditd-on-os-x-these-are-logs.html). In order to begin monitoring for such events first declare a block to pass to the library. This block's type should be `ProcessCallbackBlock` which has been typedef'd in the `procInfo.h` header file as: ```Objective-C typedef void (^ProcessCallbackBlock)(Process*); ``` From this typedef, one can see this block will invoked with a pointer to a `Process` object, which is (as expected) represents the process which triggered the event. After creating a callback block, simply invoke the Proc Info `start:` method, passing in the block. This will kickoff asynchronous process monitoring. Now, anytime a process creation or exit event occurs, the code in the block will be automatically invoked! One can be query returned `Process` object for the event type (`EVENT_FORK`, `EVENT_EXIT`, etc). If the event was not an exit event, the `Process` object will be fully instantiated, thus containing information such as ancestors, arguments, `Binary` object, etc. Note that for `EVENT_EXIT` events, the `Process` object will only contain the process identifier (`pid`) and the processes exit code. Below is some example code that will call into the Proc Info library to asynchronously monitor for process events. Once the library detects such events, it will automatically invoke the passed in `block` which here, just examines the event type and then dumps information about the process to `stdout`: ```Objective-C //define block // ->automatically invoked upon process events ProcessCallbackBlock block = ^(Process* process) { //process start event // ->fork, spawn, exec, etc. if(process.type != EVENT_EXIT) { //print NSLog(@"process start: %@\n", process); } //process exit event else { //print // ->only pid NSLog(@"process exit: %d\n", process.pid); } }; //start monitoring // ->pass in block for events [processInfo start:block]; //run loop // ->as don't want to exit [[NSRunLoop currentRunLoop] run]; ``` Executing this code, and starting a process such as `Calculator.app` results in the following output: ```Objective-C # ./procInfoExample: process start: pid: 1337 path: /Applications/Calculator.app/Contents/MacOS/Calculator user: 501 args: ( "/Applications/Calculator.app/Contents/MacOS/Calculator" ) ancestors: ( 557, 554, 353, 1 ) binary: name: Calculator path: /Applications/Calculator.app/Contents/MacOS/Calculator attributes: { NSFileCreationDate = "2017-03-23 00:27:11 +0000"; NSFileExtensionHidden = 0; NSFileGroupOwnerAccountID = 0; NSFileGroupOwnerAccountName = wheel; NSFileHFSCreatorCode = 0; NSFileHFSTypeCode = 0; NSFileModificationDate = "2017-03-23 00:27:11 +0000"; NSFileOwnerAccountID = 0; NSFileOwnerAccountName = root; NSFilePosixPermissions = 493; NSFileReferenceCount = 1; NSFileSize = 199520; NSFileSystemFileNumber = 92435925; NSFileSystemNumber = 16777220; NSFileType = NSFileTypeRegular; } signing info: { signatureStatus = 0; signedByApple = 1; signingAuthorities = ( "Software Signing", "Apple Code Signing Certification Authority", "Apple Root CA" ); } (isApple: 1 / isAppStore: 0) 2017-08-07 08:49:02.199 procInfoExample[10393:3296896] process exit: 1337 ``` It should be noted that if the Proc Info library is not running with root privileges, or is executed on an older version of macOS (pre 10.12.4) it will only monitor for application events (i.e. not terminal nor background processes). This is because in order to safely monitor for audit events, root and recent version of macOS is required. **Mahalo!**
This product is supported by the following patrons: + Halo Privacy + Ash Morgan + Nando Mendonca + Khalil Sehnaoui + Jeff Golden + Geoffrey Weber + Ming + Peter Sinclair + trifero + Keelian Wardle + Chad Collins + Shain Singh + David Sulpy + Martin OConnell + Bill Smartt + Mike Windham + Brent Joyce + Russell Imrie + Michael Thomas + Andy One + Edmund Harriss + Brad Knowles + Tom Smith + Chuck Talk + Derivative Fool + Joaquim Espinhara + Rudolf Coetzee + Chris Ferebee + Les Aker + Allen Hancock + Stuart Ashenbrenner + Gamer_Bot Want to add your support? Check out my [patreon page](https://www.patreon.com/objective_see) :) ================================================ FILE: lib/procInfo.h ================================================ // // File: procInfo.h // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #ifndef procInfo_h #define procInfo_h #import #import #import /* CLASSES */ @class Binary; @class Process; /* DEFINES */ //from audit_kevents.h #define EVENT_EXIT 1 #define EVENT_FORK 2 #define EVENT_EXECVE 23 #define EVENT_EXEC 27 #define EVENT_SPAWN 43190 //signers enum Signer{None, Apple, AppStore, DevID, AdHoc}; //signature status #define KEY_SIGNATURE_STATUS @"signatureStatus" //signer #define KEY_SIGNATURE_SIGNER @"signatureSigner" //signing auths #define KEY_SIGNATURE_AUTHORITIES @"signatureAuthorities" //code signing id #define KEY_SIGNATURE_IDENTIFIER @"signatureIdentifier" //entitlements #define KEY_SIGNATURE_ENTITLEMENTS @"signatureEntitlements" /* TYPEDEFS */ //block for library typedef void (^ProcessCallbackBlock)(Process* _Nonnull); /* OBJECT: PROCESS INFO */ @interface ProcInfo : NSObject //init w/ flag // flag dictates if CPU-intensive logic (code signing, etc) should be preformed -(id _Nullable)init:(BOOL)goEasy; //start monitoring -(void)start:(ProcessCallbackBlock _Nonnull )callback; //stop monitoring -(void)stop; //get list of running processes -(NSMutableArray* _Nonnull)currentProcesses; @end /* OBJECT: PROCESS */ @interface Process : NSObject /* PROPERTIES */ //pid @property pid_t pid; //ppid @property pid_t ppid; //user id @property uid_t uid; //type // used by process mon @property u_int16_t type; //exit code @property u_int32_t exit; //path @property(nonatomic, retain)NSString* _Nullable path; //args @property(nonatomic, retain)NSMutableArray* _Nonnull arguments; //ancestors @property(nonatomic, retain)NSMutableArray* _Nonnull ancestors; //signing info @property(nonatomic, retain)NSMutableDictionary* _Nonnull signingInfo; //Binary object // has path, hash, etc @property(nonatomic, retain)Binary* _Nonnull binary; //timestamp @property(nonatomic, retain)NSDate* _Nonnull timestamp; /* METHODS */ //init with a pid // method will then (try) fill out rest of object -(id _Nullable)init:(pid_t)processID; //generate signing info // also classifies if Apple/from App Store/etc. -(void)generateSigningInfo:(SecCSFlags)flags; //set process's path -(void)pathFromPid; //generate list of ancestors -(void)enumerateAncestors; //class method // get's parent of arbitrary process +(pid_t)getParentID:(pid_t)child; @end /* OBJECT: BINARY */ @interface Binary : NSObject { } /* PROPERTIES */ //path @property(nonatomic, retain)NSString* _Nonnull path; //name @property(nonatomic, retain)NSString* _Nonnull name; //icon @property(nonatomic, retain)NSImage* _Nonnull icon; //file attributes @property(nonatomic, retain)NSDictionary* _Nullable attributes; //spotlight meta data @property(nonatomic, retain)NSDictionary* _Nullable metadata; //bundle // nil for non-apps @property(nonatomic, retain)NSBundle* _Nullable bundle; //signing info @property(nonatomic, retain)NSDictionary* _Nonnull signingInfo; //hash @property(nonatomic, retain)NSMutableString* _Nonnull sha256; //identifier // either signing id or sha256 hash @property(nonatomic, retain)NSString* _Nonnull identifier; /* METHODS */ //init w/ a path -(id _Nonnull)init:(NSString* _Nonnull)path; /* the following methods are rather CPU-intensive as such, if the proc monitoring is run with the 'goEasy' option, they aren't automatically invoked */ //get an icon for a process // for apps, this will be app's icon, otherwise just a standard system one -(void)getIcon; //generate signing info (statically) -(void)generateSigningInfo:(SecCSFlags)flags; /* the following methods are not invoked automatically as such, if you code has to manually invoke them if you want this info */ //generate hash // algo: sha256 -(void)generateHash; //generate id // either signing id, or sha256 hash -(void)generateIdentifier; @end #endif ================================================ FILE: procInfo/Binary.m ================================================ // // File: Binary.m // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #import "Consts.h" #import "Signing.h" #import "procInfo.h" #import "Utilities.h" #import @implementation Binary @synthesize icon; @synthesize name; @synthesize path; @synthesize bundle; @synthesize metadata; @synthesize attributes; //init binary object // note: CPU-intensive logic (code signing, etc) called manually -(id)init:(NSString*)binaryPath { //init super self = [super init]; if(nil != self) { //not a full path? if(YES != [binaryPath hasPrefix:@"/"]) { //try find via 'which' self.path = PI_which(binaryPath); if(nil == self.path) { //stuck with short path self.path = binaryPath; } } //full path // use as is else { //save path self.path = binaryPath; } //try load app bundle // will be nil for non-apps [self getBundle]; //get name [self getName]; //get file attributes [self getAttributes]; //get meta data (spotlight) [self getMetadata]; } return self; } //try load app bundle // will be nil for non-apps -(void)getBundle { //first try just with path self.bundle = [NSBundle bundleWithPath:path]; //that failed? // try find it dynamically if(nil == self.bundle) { //find bundle self.bundle = PI_findAppBundle(path); } return; } //figure out binary's name // either via app bundle, or from path -(void)getName { //first try get name from app bundle // specifically, via grab name from 'CFBundleName' if(nil != self.bundle) { //extract name self.name = [self.bundle infoDictionary][@"CFBundleName"]; } //no app bundle || no 'CFBundleName' // just use last component from path if(nil == self.name) { //set name self.name = [self.path lastPathComponent]; } return; } //get file attributes -(void)getAttributes { //grab (file) attributes self.attributes = [[NSFileManager defaultManager] attributesOfItemAtPath:self.path error:nil]; return; } //get (spotlight) meta data -(void)getMetadata { //md item ref MDItemRef mdItem = nil; //attributes names CFArrayRef attributeNames = nil; //create mdItem = MDItemCreate(kCFAllocatorDefault, (CFStringRef)self.path); if(nil == mdItem) { //bail goto bail; } //copy names attributeNames = MDItemCopyAttributeNames(mdItem); if(nil == attributeNames) { //bail goto bail; } //get metadata self.metadata = CFBridgingRelease(MDItemCopyAttributes(mdItem, attributeNames)); bail: //release names if(NULL != attributeNames) { //release CFRelease(attributeNames); //unset attributeNames = NULL; } //release md item if(NULL != mdItem) { //release CFRelease(mdItem); //unset mdItem = NULL; } return; } //get an icon for a process // for apps, this will be app's icon, otherwise just a standard system one -(void)getIcon { //icon's file name NSString* iconFile = nil; //icon's path NSString* iconPath = nil; //icon's path extension NSString* iconExtension = nil; //skip 'short' paths // otherwise system logs an error if( (YES != [self.path hasPrefix:@"/"]) && (nil == self.bundle) ) { //bail goto bail; } //for app's // extract their icon if(nil != self.bundle) { //get file iconFile = self.bundle.infoDictionary[@"CFBundleIconFile"]; //get path extension iconExtension = [iconFile pathExtension]; //if its blank (i.e. not specified) // go with 'icns' if(YES == [iconExtension isEqualTo:@""]) { //set type iconExtension = @"icns"; } //set full path iconPath = [self.bundle pathForResource:[iconFile stringByDeletingPathExtension] ofType:iconExtension]; //load it self.icon = [[NSImage alloc] initWithContentsOfFile:iconPath]; } //process is not an app or couldn't get icon // try to get it via shared workspace if( (nil == self.bundle) || (nil == self.icon) ) { //extract icon self.icon = [[NSWorkspace sharedWorkspace] iconForFile:self.path]; } //make standard size... [self.icon setSize:NSMakeSize(128, 128)]; bail: return; } //statically, generate signing info -(void)generateSigningInfo:(SecCSFlags)flags { //extract signing info statically self.signingInfo = extractSigningInfo(0, self.path, flags); return; } //generate hash -(void)generateHash { //file's contents NSData* fileContents = nil; //hash digest uint8_t digestSHA256[CC_SHA256_DIGEST_LENGTH] = {0}; //load file fileContents = [NSData dataWithContentsOfFile:self.path]; if( (0 == fileContents.length) || (NULL == fileContents.bytes) ) { //bail goto bail; } //clear buffer bzero(digestSHA256, CC_SHA256_DIGEST_LENGTH); //sha it CC_SHA256(fileContents.bytes, (unsigned int)fileContents.length, digestSHA256); //now init self.sha256 = [NSMutableString string]; //convert to NSString // iterate over each byte in computed digest and format for(NSUInteger index=0; index < CC_SHA256_DIGEST_LENGTH; index++) { //format/append [self.sha256 appendFormat:@"%02X", digestSHA256[index]]; } bail: return; } //generate id // either signing id, or sha256 hash // note: will generate signing info if needed -(void)generateIdentifier { //generate signing info? if(nil == self.signingInfo) { //generate [self generateSigningInfo:kSecCSDefaultFlags]; } //validly signed binary? // use its signing identifier if( (noErr == [self.signingInfo[KEY_SIGNATURE_STATUS] intValue]) && (0 != [self.signingInfo[KEY_SIGNATURE_AUTHORITIES] count]) && (nil != self.signingInfo[KEY_SIGNATURE_IDENTIFIER]) ) { //use signing id self.identifier = self.signingInfo[KEY_SIGNATURE_IDENTIFIER]; } //not validly signed or unsigned // generate sha256 hash for identifier else { //generate hash? if(0 != self.sha256.length) { //hash [self generateHash]; } //use hash self.identifier = self.sha256; } return; } //for pretty printing -(NSString *)description { //pretty print return [NSString stringWithFormat: @"name: %@\npath: %@\nattributes: %@\nsigning info: %@", self.name, self.path, self.attributes, self.signingInfo]; } @end ================================================ FILE: procInfo/Consts.h ================================================ // // File: Consts.h // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #ifndef Consts_h #define Consts_h //OS version x #define OS_MAJOR_VERSION_X 10 //OS version lion #define OS_MINOR_VERSION_LION 8 //OS version sierra #define OS_MINOR_VERSION_SIERRA 12 //audit pipe #define AUDIT_PIPE "/dev/auditpipe" //audit class for proc events #define AUDIT_CLASS_PROCESS 0x00000080 //audit class for exec events #define AUDIT_CLASS_EXEC 0x40000000 //key for stdout output #define STDOUT @"stdOutput" //key for stderr output #define STDERR @"stdError" //key for exit code #define EXIT_CODE @"exitCode" //path to codesign #define CODE_SIGN @"/usr/bin/codesign" //entitlements #define KEY_SIGNING_ENTITLEMENTS @"entitlements" #endif /* Consts_h */ ================================================ FILE: procInfo/Process.m ================================================ // // File: Process.m // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #import "Signing.h" #import "procInfo.h" #import "Utilities.h" @implementation Process @synthesize pid; @synthesize exit; @synthesize path; @synthesize ppid; @synthesize ancestors; @synthesize arguments; @synthesize timestamp; @synthesize signingInfo; //init -(id)init { //init super self = [super init]; if(nil != self) { //alloc array for args arguments = [NSMutableArray array]; //alloc array for parents ancestors = [NSMutableArray array]; //alloc array for args arguments = [NSMutableArray array]; //set start time timestamp = [NSDate date]; //init pid self.pid = -1; //init ppid self.ppid = -1; //init user self.uid = -1; //init exit self.exit = -1; } return self; } //init with a pid // method will then (try) fill out rest of object -(id)init:(pid_t)processID { //init self/super self = [self init]; if(self) { //save pid self.pid = processID; //set parent self.ppid = [[self class] getParentID:self.pid]; //get path [self pathFromPid]; if(0 == self.path.length) { #ifdef DEBUG //err msg NSLog(@"ERROR: failed to find path for process %d\n", self.pid); #endif //unset self = nil; //bail goto bail; } //set args [self getArgs]; //set user [self getUser]; //enum ancestors [self enumerateAncestors]; //init binary self.binary = [[Binary alloc] init:self.path]; } bail: return self; } //get uid // sets 'user' instance var -(void)getUser { //kinfo_proc struct struct kinfo_proc processStruct = {0}; //size size_t procBufferSize = 0; //mib const u_int mibLength = 4; //syscall result int sysctlResult = -1; //init buffer length procBufferSize = sizeof(processStruct); //init mib int mib[mibLength] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, self.pid}; //make syscall sysctlResult = sysctl(mib, mibLength, &processStruct, &procBufferSize, NULL, 0); //check if got ppid if( (noErr == sysctlResult) && (0 != procBufferSize) ) { //save uid self.uid = processStruct.kp_eproc.e_ucred.cr_uid; } return; } //generate list of ancestors -(void)enumerateAncestors { //current process id pid_t currentPID = -1; //parent pid pid_t parentPID = -1; //add parent if(-1 != self.ppid) { //add [self.ancestors addObject:[NSNumber numberWithInt:self.ppid]]; //set current to parent currentPID = self.ppid; } //don't know parent // just start with self else { //start w/ self currentPID = self.pid; } //add until we get to to end (pid 0) // or error out during the traversal while(YES) { //get parent pid parentPID = [Process getParentID:currentPID]; if( (0 == parentPID) || (-1 == parentPID) || (currentPID == parentPID) ) { //bail break; } //update currentPID = parentPID; //add [self.ancestors addObject:[NSNumber numberWithInt:parentPID]]; } return; } //set process's path -(void)pathFromPid { //buffer for process path char pathBuffer[PROC_PIDPATHINFO_MAXSIZE] = {0}; //status int status = -1; //'management info base' array int mib[3] = {0}; //system's size for max args int systemMaxArgs = 0; //process's args char* processArgs = NULL; //size of buffers, etc size_t size = 0; //clear out buffer bzero(pathBuffer, PROC_PIDPATHINFO_MAXSIZE); //1st: // attempt to get path via 'proc_pidpath()' status = proc_pidpath(self.pid, pathBuffer, sizeof(pathBuffer)); if( (0 != status) && (0 != strlen(pathBuffer)) ) { //init path self.path = [NSString stringWithUTF8String:pathBuffer]; //all set goto bail; } //2nd: // try via process's args ('KERN_PROCARGS2') //init mib // want system's size for max args mib[0] = CTL_KERN; mib[1] = KERN_ARGMAX; //set size size = sizeof(systemMaxArgs); //get system's size for max args if(-1 == sysctl(mib, 2, &systemMaxArgs, &size, NULL, 0)) { //bail goto bail; } //alloc space for args processArgs = calloc(systemMaxArgs, sizeof(char)); if(NULL == processArgs) { //bail goto bail; } //init mib // want process args mib[0] = CTL_KERN; mib[1] = KERN_PROCARGS2; mib[2] = pid; //set size size = (size_t)systemMaxArgs; //get process's args if(-1 == sysctl(mib, 3, processArgs, &size, NULL, 0)) { //bail goto bail; } //sanity check // ensure buffer is somewhat sane if(size <= sizeof(int)) { //bail goto bail; } //extract process name // follows # of args (int) and is NULL-terminated self.path = [NSString stringWithUTF8String:processArgs + sizeof(int)]; bail: //free process args if(NULL != processArgs) { //free free(processArgs); //unset processArgs = NULL; } return; } //check if process is alive -(BOOL)isProcessAlive { //ret var BOOL bIsAlive = NO; //signal status int signalStatus = -1; //send kill with 0 to determine if alive // see: http://stackoverflow.com/questions/9152979/check-if-process-exists-given-its-pid signalStatus = kill(self.pid, 0); //is alive? if( (0 == signalStatus) || ( (0 != signalStatus) && (errno != ESRCH) ) ) { //alive! bIsAlive = YES; } return bIsAlive; } //extract commandline args // saves into 'arguments' ivar -(void)getArgs { //'management info base' array int mib[3] = {0}; //system's size for max args int systemMaxArgs = 0; //process's args char* processArgs = NULL; //# of args int numberOfArgs = 0; //start of (each) arg char* argStart = NULL; //size of buffers, etc size_t size = 0; //parser pointer char* parser = NULL; //init mib // want system's size for max args mib[0] = CTL_KERN; mib[1] = KERN_ARGMAX; //set size size = sizeof(systemMaxArgs); //get system's size for max args if(-1 == sysctl(mib, 2, &systemMaxArgs, &size, NULL, 0)) { //bail goto bail; } //alloc space for args processArgs = malloc(systemMaxArgs); if(NULL == processArgs) { //bail goto bail; } //init mib // want process args mib[0] = CTL_KERN; mib[1] = KERN_PROCARGS2; mib[2] = pid; //set size size = (size_t)systemMaxArgs; //get process's args if(-1 == sysctl(mib, 3, processArgs, &size, NULL, 0)) { //bail goto bail; } //sanity check // ensure buffer is somewhat sane if(size <= sizeof(int)) { //bail goto bail; } //extract number of args // at start of buffer memcpy(&numberOfArgs, processArgs, sizeof(numberOfArgs)); //init pointer to start of args // they start right after # of args parser = processArgs + sizeof(numberOfArgs); //scan until end of process's NULL-terminated path while(parser < &processArgs[size]) { //scan till NULL-terminator if(0x0 == *parser) { //end of exe name break; } //next char parser++; } //sanity check // make sure end-of-buffer wasn't reached if(parser == &processArgs[size]) { //bail goto bail; } //skip all trailing NULLs // scan will end when non-NULL is found while(parser < &processArgs[size]) { //scan till NULL-terminator if(0x0 != *parser) { //ok, got to argv[0] break; } //next char parser++; } //sanity check // (again), make sure end-of-buffer wasn't reached if(parser == &processArgs[size]) { //bail goto bail; } //parser should now point to argv[0], process name // init arg start argStart = parser; //keep scanning until all args are found // each is NULL-terminated while(parser < &processArgs[size]) { //each arg is NULL-terminated // so scan till NULL, then save into array if(*parser == '\0') { //save arg if(NULL != argStart) { //save [self.arguments addObject:[NSString stringWithUTF8String:argStart]]; } //init string pointer to (possibly) next arg argStart = ++parser; //bail if we've hit arg cnt if(self.arguments.count == numberOfArgs) { //bail break; } } //next char parser++; } bail: //free process args if(NULL != processArgs) { //free free(processArgs); //unset processArgs = NULL; } return; } //generate signing info // also classifies if Apple/from App Store/etc. -(void)generateSigningInfo:(SecCSFlags)flags { //extract signing info dynamically self.signingInfo = extractSigningInfo(self.pid, nil, flags); //failed? // try extract signing info statically if(nil == self.signingInfo) { //add 'all archs' / 'nested' // cuz don't know which is/was running flags |= kSecCSCheckAllArchitectures | kSecCSCheckNestedCode | kSecCSDoNotValidateResources; //extract signing info statically self.signingInfo = extractSigningInfo(0, self.binary.path, flags); } return; } //for pretty printing -(NSString *)description { //pretty print return [NSString stringWithFormat: @"pid: %d\npath: %@\nuser: %d\nargs: %@\nancestors: %@\n signing info: %@\n binary:\n%@", self.pid, self.path, self.uid, self.arguments, self.ancestors, self.signingInfo, self.binary]; } //class method to get parent of arbitrary process +(pid_t)getParentID:(pid_t)child { //parent id pid_t parentID = -1; //kinfo_proc struct struct kinfo_proc processStruct = {0}; //size size_t procBufferSize = 0; //mib const u_int mibLength = 4; //syscall result int sysctlResult = -1; //init buffer length procBufferSize = sizeof(processStruct); //init mib int mib[mibLength] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, child}; //make syscall sysctlResult = sysctl(mib, mibLength, &processStruct, &procBufferSize, NULL, 0); //check if got ppid if( (noErr == sysctlResult) && (0 != procBufferSize) ) { //save ppid parentID = processStruct.kp_eproc.e_ppid; } return parentID; } @end ================================================ FILE: procInfo/ProcessMonitor.m ================================================ // // File: ProcessMonitor.m // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // //disable incomplete/umbrella warnings // otherwise complains about 'audit_kevents.h' #pragma clang diagnostic ignored "-Wincomplete-umbrella" #import "Consts.h" #import "procInfo.h" #import "Utilities.h" #import #import #import #import #import #import #import #import #import #import @interface ProcInfo() /* INSTANCE VARIABLES */ //skip CPU-intensive logic @property BOOL goEasy; //callback block @property(nonatomic, copy)ProcessCallbackBlock processCallback; //stop flag @property BOOL shouldStop; @end @implementation ProcInfo //init // just check OS version -(id _Nullable)init { //super self = [super init]; if(self) { //make sure OS is supported // for now, OS X 10.8+ though could be earlier? if(YES != PI_isSupportedOS()) { //err msg NSLog(@"ERROR: %@ is not a supported OS", PI_getOSVersion()); //unset self = nil; //bail goto bail; } } bail: return self; } //init w/ flag // flag dictates if CPU-intensive logic (code signing, etc) should be preformed -(id _Nullable)init:(BOOL)goEasy; { //init // calls 'super' too self = [self init]; if(self) { //save mode self.goEasy = goEasy; } bail: return self; } //start monitoring // note: requires root/macOS 10.12.4+ for full monitoring -(void)start:(ProcessCallbackBlock)callback { //OS version info NSDictionary* osVersionInfo = nil; //save self.processCallback = callback; //get OS version info osVersionInfo = PI_getOSVersion(); //do basic (app) monitoring // if not root, or OS version is < 10.12.4 (due to kernel bug) if( (0 != getuid()) || ([osVersionInfo[@"minorVersion"] intValue] < OS_MINOR_VERSION_SIERRA) || (([osVersionInfo[@"minorVersion"] intValue] == OS_MINOR_VERSION_SIERRA) && ([osVersionInfo[@"bugfixVersion"] intValue] < 4)) ) { //setup app monitoring [self appMonitor]; } //otherwise, enable full monitoring else { //start process monitoring via openBSM to get apps & procs // sits in while(YES) loop, so we invoke call in a background thread dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ //monitor [self monitor]; }); } return; } //stop monitoring -(void)stop { //stop app monitoring // can always call, even if we didn't setup app monitor [[NSNotificationCenter defaultCenter] removeObserver: self]; //set 'stop' monitor bool // is checked in 'monitor' method as termination condition self.shouldStop = YES; return; } //monitor for new process events -(void)monitor { //event mask // what event classes to watch for u_int eventClasses = AUDIT_CLASS_EXEC | AUDIT_CLASS_PROCESS; //file pointer to audit pipe FILE* auditFile = NULL; //file descriptor for audit pipe int auditFileDescriptor = -1; //status var int status = -1; //preselect mode int mode = -1; //queue length int maxQueueLength = -1; //record buffer u_char* recordBuffer = NULL; //token struct tokenstr_t tokenStruct = {0}; //total length of record int recordLength = -1; //amount of record left to process int recordBalance = -1; //amount currently processed int processedLength = -1; //process record obj Process* process = nil; //last fork Process* lastFork = nil; //argument NSString* argument = nil; //open audit pipe for reading auditFile = fopen(AUDIT_PIPE, "r"); if(auditFile == NULL) { #ifdef DEBUG //err msg NSLog(@"ERROR: failed to open audit pipe %s", AUDIT_PIPE); #endif //bail goto bail; } //grab file descriptor auditFileDescriptor = fileno(auditFile); //init mode mode = AUDITPIPE_PRESELECT_MODE_LOCAL; //set preselect mode status = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_MODE, &mode); if(-1 == status) { //bail goto bail; } //grab max queue length status = ioctl(auditFileDescriptor, AUDITPIPE_GET_QLIMIT_MAX, &maxQueueLength); if(-1 == status) { //bail goto bail; } //set queue length to max status = ioctl(auditFileDescriptor, AUDITPIPE_SET_QLIMIT, &maxQueueLength); if(-1 == status) { //bail goto bail; } //set preselect flags // event classes we're interested in status = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_FLAGS, &eventClasses); if(-1 == status) { //bail goto bail; } //set non-attributable flags // event classes we're interested in status = ioctl(auditFileDescriptor, AUDITPIPE_SET_PRESELECT_NAFLAGS, &eventClasses); if(-1 == status) { //bail goto bail; } //forever // read/parse/process audit records while(YES) { @autoreleasepool { //first check termination flag/condition if(YES == self.shouldStop) { //bail goto bail; } //reset process record object process = nil; //free prev buffer if(NULL != recordBuffer) { //free free(recordBuffer); //unset recordBuffer = NULL; } //read a single audit record // note: buffer is allocated by function, so must be freed when done recordLength = au_read_rec(auditFile, &recordBuffer); //sanity check if(-1 == recordLength) { //continue continue; } //init (remaining) balance to record's total length recordBalance = recordLength; //init processed length to start (zer0) processedLength = 0; //parse record // read all tokens/process while(0 != recordBalance) { //extract token // and sanity check if(-1 == au_fetch_tok(&tokenStruct, recordBuffer + processedLength, recordBalance)) { //error // skip record break; } //ignore records that are not related to process exec'ing/spawning // gotta wait till we hit/capture a AUT_HEADER* though, as this has the event type if( (nil != process) && (YES != [self shouldProcessRecord:process.type]) ) { //bail // skips rest of record break; } //process token(s) // create Process object, etc switch(tokenStruct.id) { //handle start of record // grab event type, which allows us to ignore events not of interest case AUT_HEADER32: case AUT_HEADER32_EX: case AUT_HEADER64: case AUT_HEADER64_EX: { //create a new process process = [[Process alloc] init]; //save type process.type = tokenStruct.tt.hdr32.e_type; break; } //path // note: this might be updated/replaced later (if it's '/dev/null', etc) case AUT_PATH: { //save path process.path = [NSString stringWithUTF8String:tokenStruct.tt.path.path]; break; } //subject // extract/save pid || ppid // all these cases can be treated as subj32 cuz only accessing initial members case AUT_SUBJECT32: case AUT_SUBJECT32_EX: case AUT_SUBJECT64: case AUT_SUBJECT64_EX: { //SPAWN (pid/ppid) // if there was an AUT_ARG32 (which always come first), that's the pid! so this will be the ppid if(AUE_POSIX_SPAWN == process.type) { //no AUT_ARG32? // set as pid, and try manually to get ppid if(-1 == process.pid) { //set pid process.pid = tokenStruct.tt.subj32.pid; //manually get parent process.ppid = [Process getParentID:process.pid]; } //pid already set (via AUT_ARG32) // this then, is the ppid else { //set ppid process.ppid = tokenStruct.tt.subj32.pid; } } //FORK // ppid (pid is in AUT_ARG32) else if(AUE_FORK == process.type) { //set ppid process.ppid = tokenStruct.tt.subj32.pid; } //AUE_EXEC/VE & AUE_EXIT // this is the pid else { //save pid process.pid = tokenStruct.tt.subj32.pid; //manually get parent process.ppid = [Process getParentID:process.pid]; } //get effective user id process.uid = tokenStruct.tt.subj32.euid; break; } //args // SPAWN/FORK this is pid case AUT_ARG32: case AUT_ARG64: { //save pid if( (AUE_POSIX_SPAWN == process.type) || (AUE_FORK == process.type) ) { //32bit if(AUT_ARG32 == tokenStruct.id) { //save process.pid = tokenStruct.tt.arg32.val; } //64bit else { //save process.pid = (pid_t)tokenStruct.tt.arg64.val; } } //FORK // doesn't have token for path, so try manually find it now if(AUE_FORK == process.type) { //set path [process pathFromPid]; } break; } //exec args // just save into args case AUT_EXEC_ARGS: { //save args for(int i = 0; i #import /* FUNCTIONS */ //get the signing info of a item // pid specified: extract dynamic code signing info // path specified: generate static code signing info NSMutableDictionary* extractSigningInfo(pid_t pid, NSString* path, SecCSFlags flags); //determine who signed item NSNumber* extractSigner(SecStaticCodeRef code, SecCSFlags flags, BOOL isDynamic); //validate a requirement OSStatus validateRequirement(SecStaticCodeRef code, SecRequirementRef requirement, SecCSFlags flags, BOOL isDynamic); //extract (names) of signing auths NSMutableArray* extractSigningAuths(NSDictionary* signingDetails); #endif ================================================ FILE: procInfo/Signing.m ================================================ // // File: Signing.m // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #import "Consts.h" #import "Signing.h" #import "procInfo.h" #import "Utilities.h" #import #import //get the signing info of a item // pid specified: extract dynamic code signing info // path specified: generate static code signing info NSMutableDictionary* extractSigningInfo(pid_t pid, NSString* path, SecCSFlags flags) { //info dictionary NSMutableDictionary* signingInfo = nil; //status OSStatus status = !errSecSuccess; //static code ref SecStaticCodeRef staticCode = NULL; //dynamic code ref SecCodeRef dynamicCode = NULL; //signing details CFDictionaryRef signingDetails = NULL; //signing authorities NSMutableArray* signingAuths = nil; //init signing status signingInfo = [NSMutableDictionary dictionary]; //dynamic code checks // no path, dynamic check via pid if(nil == path) { //generate dynamic code ref via pid status = SecCodeCopyGuestWithAttributes(NULL, (__bridge CFDictionaryRef _Nullable)(@{(__bridge NSString *)kSecGuestAttributePid : [NSNumber numberWithInt:pid]}), kSecCSDefaultFlags, &dynamicCode); if(errSecSuccess != status) { //set error signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:status]; //bail goto bail; } //validate code status = SecCodeCheckValidity(dynamicCode, flags, NULL); if(errSecSuccess != status) { //set error signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:status]; //bail goto bail; } //happily signed signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:errSecSuccess]; //determine signer // apple, app store, dev id, adhoc, etc... signingInfo[KEY_SIGNATURE_SIGNER] = extractSigner(dynamicCode, flags, YES); //extract signing info status = SecCodeCopySigningInformation(dynamicCode, kSecCSSigningInformation, &signingDetails); if(errSecSuccess != status) { //bail goto bail; } } //static code checks else { //create static code ref via path status = SecStaticCodeCreateWithPath((__bridge CFURLRef)([NSURL fileURLWithPath:path]), kSecCSDefaultFlags, &staticCode); if(errSecSuccess != status) { //set error signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:status]; //bail goto bail; } //check signature status = SecStaticCodeCheckValidity(staticCode, flags, NULL); if(errSecSuccess != status) { //set error signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:status]; //bail goto bail; } //happily signed signingInfo[KEY_SIGNATURE_STATUS] = [NSNumber numberWithInt:errSecSuccess]; //determine signer // apple, app store, dev id, adhoc, etc... signingInfo[KEY_SIGNATURE_SIGNER] = extractSigner(staticCode, flags, NO); //extract signing info status = SecCodeCopySigningInformation(staticCode, kSecCSSigningInformation, &signingDetails); if(errSecSuccess != status) { //bail goto bail; } } //extract code signing id if(nil != [(__bridge NSDictionary*)signingDetails objectForKey:(__bridge NSString*)kSecCodeInfoIdentifier]) { //extract/save signingInfo[KEY_SIGNATURE_IDENTIFIER] = [(__bridge NSDictionary*)signingDetails objectForKey:(__bridge NSString*)kSecCodeInfoIdentifier]; } //extract entitlements if(nil != [(__bridge NSDictionary*)signingDetails objectForKey:(__bridge NSString*)kSecCodeInfoEntitlementsDict]) { //extract/save signingInfo[KEY_SIGNATURE_ENTITLEMENTS] = [(__bridge NSDictionary*)signingDetails objectForKey:(__bridge NSString*)kSecCodeInfoEntitlementsDict]; } //extract signing authorities signingAuths = extractSigningAuths((__bridge NSDictionary *)(signingDetails)); if(0 != signingAuths.count) { //save signingInfo[KEY_SIGNATURE_AUTHORITIES] = signingAuths; } bail: //free signing info if(NULL != signingDetails) { //free CFRelease(signingDetails); //unset signingDetails = NULL; } //free dynamic code if(NULL != dynamicCode) { //free CFRelease(dynamicCode); //unset dynamicCode = NULL; } //free static code if(NULL != staticCode) { //free CFRelease(staticCode); //unset staticCode = NULL; } return signingInfo; } //determine who signed item NSNumber* extractSigner(SecStaticCodeRef code, SecCSFlags flags, BOOL isDynamic) { //result NSNumber* signer = nil; //"anchor apple" static SecRequirementRef isApple = nil; //"anchor apple generic" static SecRequirementRef isDevID = nil; //"anchor apple generic and certificate leaf [subject.CN] = \"Apple Mac OS Application Signing\"" static SecRequirementRef isAppStore = nil; //token static dispatch_once_t onceToken = 0; //only once // init requirements dispatch_once(&onceToken, ^{ //init apple signing requirement SecRequirementCreateWithString(CFSTR("anchor apple"), kSecCSDefaultFlags, &isApple); //init dev id signing requirement SecRequirementCreateWithString(CFSTR("anchor apple generic"), kSecCSDefaultFlags, &isDevID); //init app store signing requirement SecRequirementCreateWithString(CFSTR("anchor apple generic and certificate leaf [subject.CN] = \"Apple Mac OS Application Signing\""), kSecCSDefaultFlags, &isAppStore); }); //check 1: "is apple" (proper) if(errSecSuccess == validateRequirement(code, isApple, flags, isDynamic)) { //set signer to apple signer = [NSNumber numberWithInt:Apple]; } //check 2: "is app store" // note: this is more specific than dev id, so do it first else if(errSecSuccess == validateRequirement(code, isAppStore, flags, isDynamic)) { //set signer to app store signer = [NSNumber numberWithInt:AppStore]; } //check 3: "is dev id" else if(errSecSuccess == validateRequirement(code, isDevID, flags, isDynamic)) { //set signer to dev id signer = [NSNumber numberWithInt:DevID]; } //otherwise // has to be adhoc? else { //set signer to ad hoc signer = [NSNumber numberWithInt:AdHoc]; } return signer; } //validate a requirement OSStatus validateRequirement(SecStaticCodeRef code, SecRequirementRef requirement, SecCSFlags flags, BOOL isDynamic) { //result OSStatus result = -1; //dynamic check? if(YES == isDynamic) { //validate dynamically result = SecCodeCheckValidity((SecCodeRef)code, flags, requirement); } //static check else { //validate statically result = SecStaticCodeCheckValidity(code, flags, requirement); } return result; } //extract (names) of signing auths NSMutableArray* extractSigningAuths(NSDictionary* signingDetails) { //signing auths NSMutableArray* authorities = nil; //cert chain NSArray* certificateChain = nil; //index NSUInteger index = 0; //cert SecCertificateRef certificate = NULL; //common name on chert CFStringRef commonName = NULL; //init array for certificate names authorities = [NSMutableArray array]; //get cert chain certificateChain = [signingDetails objectForKey:(__bridge NSString*)kSecCodeInfoCertificates]; if(0 == certificateChain.count) { //no certs goto bail; } //extract/save name of all certs for(index = 0; index < certificateChain.count; index++) { //reset commonName = NULL; //extract cert certificate = (__bridge SecCertificateRef)([certificateChain objectAtIndex:index]); //get common name if( (errSecSuccess == SecCertificateCopyCommonName(certificate, &commonName)) && (NULL != commonName) ) { //save [authorities addObject:(__bridge id _Nonnull)(commonName)]; //release CFRelease(commonName); } } bail: return authorities; } ================================================ FILE: procInfo/Utilities.h ================================================ // // File: Utilities.h // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #ifndef Utilties_h #define Utilties_h #import //given a path to binary // parse it back up to find app's bundle NSBundle* PI_findAppBundle(NSString* binaryPath); //check if current OS version is supported BOOL PI_isSupportedOS(void); //get OS version NSDictionary* PI_getOSVersion(void); //enumerate all running processes NSMutableArray* PI_enumerateProcesses(void); //given a bundle // find its executable NSString* PI_findAppBinary(NSString* appPath); //given a 'short' path or process name // find the full path by scanning $PATH NSString* PI_which(NSString* processName); #endif ================================================ FILE: procInfo/Utilities.m ================================================ // // File: Utilities.m // Project: Proc Info // // Created by: Patrick Wardle // Copyright: 2017 Objective-See // License: Creative Commons Attribution-NonCommercial 4.0 International License // #import "Consts.h" #import "Utilities.h" #import #import //disable deprecated warnings // use 'Gestalt' as this code may run on old OS X vers. #pragma clang diagnostic ignored "-Wdeprecated-declarations" //get OS version NSDictionary* PI_getOSVersion() { //os version info NSMutableDictionary* osVersionInfo = nil; //major v SInt32 majorVersion = 0; //minor v SInt32 minorVersion = 0; //bug fix v SInt32 fixVersion = 0; //alloc dictionary osVersionInfo = [NSMutableDictionary dictionary]; //get major version if(noErr != Gestalt(gestaltSystemVersionMajor, &majorVersion)) { //unset osVersionInfo = nil; //bail goto bail; } //get minor version if(noErr != Gestalt(gestaltSystemVersionMinor, &minorVersion)) { //unset osVersionInfo = nil; //bail goto bail; } //get bug fix version if(noErr != Gestalt(gestaltSystemVersionBugFix, &fixVersion)) { //unset osVersionInfo = nil; //bail goto bail; } //set major version osVersionInfo[@"majorVersion"] = [NSNumber numberWithInteger:majorVersion]; //set minor version osVersionInfo[@"minorVersion"] = [NSNumber numberWithInteger:minorVersion]; //set bug fix version osVersionInfo[@"bugfixVersion"] = [NSNumber numberWithInteger:fixVersion]; bail: return osVersionInfo; } //is current OS version supported? // for now, just OS X 10.8+ BOOL PI_isSupportedOS() { //support flag BOOL isSupported = NO; //OS version info NSDictionary* osVersionInfo = nil; //get OS version info osVersionInfo = PI_getOSVersion(); if(nil == osVersionInfo) { //bail goto bail; } //gotta be OS X if(OS_MAJOR_VERSION_X != [osVersionInfo[@"majorVersion"] intValue]) { //bail goto bail; } //gotta be OS X at least lion (10.8) if([osVersionInfo[@"minorVersion"] intValue] < OS_MINOR_VERSION_LION) { //bail goto bail; } //OS version is supported isSupported = YES; bail: return isSupported; } //enumerate all running processes NSMutableArray* PI_enumerateProcesses() { //# of procs int numberOfProcesses = 0; //array of pids pid_t* pids = NULL; //processes NSMutableArray* processes = nil; //alloc array processes = [NSMutableArray array]; //get # of procs numberOfProcesses = proc_listallpids(NULL, 0); if(-1 == numberOfProcesses) { //bail goto bail; } //alloc buffer for pids pids = calloc(numberOfProcesses, sizeof(pid_t)); if(nil == pids) { //bail goto bail; } //get list of pids numberOfProcesses = proc_listallpids(pids, numberOfProcesses*sizeof(pid_t)); if(-1 == numberOfProcesses) { //bail goto bail; } //iterate over all pids // save pid into return array for(int i = 0; i < numberOfProcesses; ++i) { //save each pid if(0 != pids[i]) { //save [processes addObject:[NSNumber numberWithUnsignedInt:pids[i]]]; } } bail: //free buffer if(NULL != pids) { //free free(pids); //unset pids = NULL; } return processes; } //given a path to binary // parse it back up to find app's bundle NSBundle* PI_findAppBundle(NSString* binaryPath) { //app's bundle NSBundle* appBundle = nil; //app's path NSString* appPath = nil; //first just try full path appPath = binaryPath; //try to find the app's bundle/info dictionary do { //try to load app's bundle appBundle = [NSBundle bundleWithPath:appPath]; //check for match // binary path's match if( (nil != appBundle) && (YES == [appBundle.executablePath isEqualToString:binaryPath])) { //all done break; } //always unset bundle var since it's being returned // and at this point, its not a match appBundle = nil; //remove last part // will try this next appPath = [appPath stringByDeletingLastPathComponent]; //scan until we get to root // of course, loop will be exited if app info dictionary is found/loaded } while( (nil != appPath) && (YES != [appPath isEqualToString:@"/"]) && (YES != [appPath isEqualToString:@""]) ); return appBundle; } //given a 'short' path or process name // try find the full path by scanning $PATH NSString* PI_which(NSString* processName) { //full path NSString* fullPath = nil; //get path NSString* path = nil; //tokenized paths NSArray* pathComponents = nil; //candidate file NSString* candidateBinary = nil; //get path path = [[[NSProcessInfo processInfo]environment]objectForKey:@"PATH"]; //split on ':' pathComponents = [path componentsSeparatedByString:@":"]; //iterate over all path components // build candidate path and check if it exists for(NSString* pathComponent in pathComponents) { //build candidate path // current path component + process name candidateBinary = [pathComponent stringByAppendingPathComponent:processName]; //check if it exists if(YES == [[NSFileManager defaultManager] fileExistsAtPath:candidateBinary]) { //check its executable if(YES == [[NSFileManager defaultManager] isExecutableFileAtPath:candidateBinary]) { //ok, happy now fullPath = candidateBinary; //stop processing break; } } }//for path components return fullPath; } ================================================ FILE: procInfo.xcodeproj/project.pbxproj ================================================ // !$*UTF8*$! { archiveVersion = 1; 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