Sigma Rules
1,619 rules found
JAMF MDM Potential Suspicious Child Process
Detects potential suspicious child processes of "jamf". Could be a sign of potential abuse of Jamf as a C2 server as seen by Typhon MythicAgent.
JAMF MDM Execution
Detects execution of the "jamf" binary to create user accounts and run commands. For example, the binary can be abused by attackers on the system in order to bypass security controls or remove application control polices.
JXA In-memory Execution Via OSAScript
Detects possible malicious execution of JXA in-memory via OSAScript
Launch Agent/Daemon Execution Via Launchctl
Detects the execution of programs as Launch Agents or Launch Daemons using launchctl on macOS.
Local System Accounts Discovery - MacOs
Detects enumeration of local systeam accounts on MacOS
Local Groups Discovery - MacOs
Detects enumeration of local system groups
MacOS Network Service Scanning
Detects enumeration of local or remote network services.
Network Sniffing - MacOs
Detects the usage of tooling to sniff network traffic. An adversary may place a network interface into promiscuous mode to passively access data in transit over the network, or use span ports to capture a larger amount of data.
File Download Via Nscurl - MacOS
Detects the execution of the nscurl utility in order to download files.
Suspicious Microsoft Office Child Process - MacOS
Detects suspicious child processes spawning from microsoft office suite applications such as word or excel. This could indicates malicious macro execution
OSACompile Run-Only Execution
Detects potential suspicious run-only executions compiled using OSACompile
Payload Decoded and Decrypted via Built-in Utilities
Detects when a built-in utility is used to decode and decrypt a payload after a macOS disk image (DMG) is executed. Malware authors may attempt to evade detection and trick users into executing malicious code by encoding and encrypting their payload and placing it in a disk image file. This behavior is consistent with adware or malware families such as Bundlore and Shlayer.
Potential Persistence Via PlistBuddy
Detects potential persistence activity using LaunchAgents or LaunchDaemons via the PlistBuddy utility
Remote Access Tool - Potential MeshAgent Execution - MacOS
Detects potential execution of MeshAgent which is a tool used for remote access. Historical data shows that threat actors rename MeshAgent binary to evade detection. Matching command lines with the '--meshServiceName' argument can indicate that the MeshAgent is being used for remote access.
Remote Access Tool - Renamed MeshAgent Execution - MacOS
Detects the execution of a renamed instance of the Remote Monitoring and Management (RMM) tool, MeshAgent. RMM tools such as MeshAgent are commonly utilized by IT administrators for legitimate remote support and system management. However, malicious actors may exploit these tools by renaming them to bypass detection mechanisms, enabling unauthorized access and control over compromised systems.
Remote Access Tool - Team Viewer Session Started On MacOS Host
Detects the command line executed when TeamViewer starts a session started by a remote host. Once a connection has been started, an investigator can verify the connection details by viewing the "incoming_connections.txt" log file in the TeamViewer folder.
Macos Remote System Discovery
Detects the enumeration of other remote systems.
Scheduled Cron Task/Job - MacOs
Detects abuse of the cron utility to perform task scheduling for initial or recurring execution of malicious code. Detection will focus on crontab jobs uploaded from the tmp folder.
Screen Capture - macOS
Detects attempts to use screencapture to collect macOS screenshots
Security Software Discovery - MacOs
Detects usage of system utilities (only grep for now) to discover security software discovery
Space After Filename - macOS
Detects attempts to masquerade as legitimate files by adding a space to the end of the filename.
Split A File Into Pieces
Detection use of the command "split" to split files into parts and possible transfer.
Osacompile Execution By Potentially Suspicious Applet/Osascript
Detects potential suspicious applet or osascript executing "osacompile".
Suspicious Browser Child Process - MacOS
Detects suspicious child processes spawned from browsers. This could be a result of a potential web browser exploitation.
Suspicious Execution via macOS Script Editor
Detects when the macOS Script Editor utility spawns an unusual child process.
Potential Discovery Activity Using Find - MacOS
Detects usage of "find" binary in a suspicious manner to perform discovery
Suspicious History File Operations
Detects commandline operations on shell history files
Potential In-Memory Download And Compile Of Payloads
Detects potential in-memory downloading and compiling of applets using curl and osacompile as seen used by XCSSET malware
Suspicious MacOS Firmware Activity
Detects when a user manipulates with Firmward Password on MacOS. NOTE - this command has been disabled on silicon-based apple computers.
System Network Discovery - macOS
Detects enumeration of local network configuration
System Information Discovery Using sw_vers
Detects the use of "sw_vers" for system information discovery
User Added To Admin Group Via Sysadminctl
Detects attempts to create and add an account to the admin group via "sysadminctl"
Guest Account Enabled Via Sysadminctl
Detects attempts to enable the guest account using the sysadminctl utility
System Information Discovery Via Sysctl - MacOS
Detects the execution of "sysctl" with specific arguments that have been used by threat actors and malware. It provides system hardware information. This process is primarily used to detect and avoid virtualization and analysis environments.
System Network Connections Discovery - MacOs
Detects usage of system utilities to discover system network connections
System Information Discovery Using System_Profiler
Detects the execution of "system_profiler" with specific "Data Types" that have been seen being used by threat actors and malware. It provides system hardware and software configuration information. This process is primarily used for system information discovery. However, "system_profiler" can also be used to determine if virtualization software is being run for defense evasion purposes.
System Shutdown/Reboot - MacOs
Adversaries may shutdown/reboot systems to interrupt access to, or aid in the destruction of, those systems.
Potential Base64 Decoded From Images
Detects the use of tail to extract bytes at an offset from an image and then decode the base64 value to create a new file with the decoded content. The detected execution is a bash one-liner.
Time Machine Backup Deletion Attempt Via Tmutil - MacOS
Detects deletion attempts of MacOS Time Machine backups via the native backup utility "tmutil". An adversary may perform this action before launching a ransonware attack to prevent the victim from restoring their files.
Time Machine Backup Disabled Via Tmutil - MacOS
Detects disabling of Time Machine (Apple's automated backup utility software) via the native macOS backup utility "tmutil". An attacker can use this to prevent backups from occurring.
New File Exclusion Added To Time Machine Via Tmutil - MacOS
Detects the addition of a new file or path exclusion to MacOS Time Machine via the "tmutil" utility. An adversary could exclude a path from Time Machine backups to prevent certain files from being backed up.
Potential WizardUpdate Malware Infection
Detects the execution traces of the WizardUpdate malware. WizardUpdate is a macOS trojan that attempts to infiltrate macOS machines to steal data and it is associated with other types of malicious payloads, increasing the chances of multiple infections on a device.
Gatekeeper Bypass via Xattr
Detects macOS Gatekeeper bypass via xattr utility
Potential XCSSET Malware Infection
Identifies the execution traces of the XCSSET malware. XCSSET is a macOS trojan that primarily spreads via Xcode projects and maliciously modifies applications. Infected users are also vulnerable to having their credentials, accounts, and other vital data stolen.
7Zip Compressing Dump Files
Detects execution of 7z in order to compress a file with a ".dmp"/".dump" extension, which could be a step in a process of dump file exfiltration.
Compress Data and Lock With Password for Exfiltration With 7-ZIP
An adversary may compress or encrypt data that is collected prior to exfiltration using 3rd party utilities
Potential DLL Injection Via AccCheckConsole
Detects the execution "AccCheckConsole" a command-line tool for verifying the accessibility implementation of an application's UI. One of the tests that this checker can run are called "verification routine", which tests for things like Consistency, Navigation, etc. The tool allows a user to provide a DLL that can contain a custom "verification routine". An attacker can build such DLLs and pass it via the CLI, which would then be loaded in the context of the "AccCheckConsole" utility.
Suspicious AddinUtil.EXE CommandLine Execution
Detects execution of the Add-In deployment cache updating utility (AddInutil.exe) with suspicious Addinroot or Pipelineroot paths. An adversary may execute AddinUtil.exe with uncommon Addinroot/Pipelineroot paths that point to the adversaries Addins.Store payload.