Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects the execution of the "chflags" utility with the "hidden" flag, in order to hide files on MacOS.
When a file or directory has this hidden flag set, it becomes invisible to the default file listing commands and in graphical file browsers.
When a file or directory has this hidden flag set, it becomes invisible to the default file listing commands and in graphical file browsers.
Hidden User Creation
Sigma
Detects creation of a hidden user account on macOS (UserID < 500) or with IsHidden option
Detects disabling security tools
Detects attempts to create and add an account to the admin group via "dscl"
Detects attempts to create and/or add an account to the admin group, thus granting admin privileges.
Detects the execution of the nscurl utility in order to download files.
Detects when the macOS Script Editor utility spawns an unusual child process.
Detects attempts to create and add an account to the admin group via "sysadminctl"
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.
This process is primarily used to detect and avoid virtualization and analysis environments.
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.
Detects install-time execution context consistent with the Axios npm supply chain compromise. This rule looks for 'node setup.js' launched from within 'node_modules/plain-crypto-js' or related npm install working directories, or for npm install commands involving 'axios' or 'plain-crypto-js'.
Detects the execution of AppleScript with the presence of 'character id' in loops. This pattern is often used by malware to hide malicious AppleScript code.
Detects the execution of a curl command downloading a shell script (.sh) directly into the /var/tmp/ directory. This technique is actively used in ClickFix social engineering campaigns, such as "Contagious Interview," where attackers manipulate developers into pasting malicious commands into the macOS Terminal to bypass Gatekeeper protections.
Detects the execution of the prt-scan supply chain campaign payload by identifying specific hardcoded exfiltration and reconnaissance log markers in command line arguments. These markers include 'PRT_EXFIL', 'PRT_RECON', 'PRT_HARVEST', 'PRT_DELAYED', 'PRT_GIT_AUTH', and 'PRT_LABEL_BYPASS'.
This rule detects the exposure of Kuwaiti Civil ID numbers in various log sources, including process command lines, additional device event fields, and email subjects/sender addresses. A Kuwaiti Civil ID is identified by a 12-digit number starting with 1, 2, or 3.
Detects execution of a base64 decoded payload piped directly into the zsh shell. This technique is highly indicative of ClickFix social engineering campaigns, where users are manipulated into copying and pasting malicious one-liners into their macOS terminal to bypass Gatekeeper and execute malware such as AMOS.
Detects the execution of an osascript command that queries system_profiler for SPMemoryDataType and checks for virtualization software strings like QEMU or VMware. This technique is actively used by the Atomic macOS Stealer (AMOS) to evade automated analysis environments and sandboxes.
Detects the execution of malicious artifacts associated with the Sapphire Sleet (UNC1069) Axios npm supply chain attack, including the initial plain-crypto-js setup, specific curl commands posting to C2, and OS-specific second-stage payload executions.
Detects the use of the curl command-line utility to perform an HTTP POST request uploading a .zip archive. This behavior is characteristic of the exfiltration phase used by macOS malware, such as Miolab Stealer, to silently transfer staged sensitive files and system profiles to a remote command-and-control server.
Identifies a process that has successfully modified the /etc/sudoers file. The sudoers file controls which users have administrative privileges and whether they require a password to execute commands as root. Unauthorized changes to this file are a primary method for attackers to gain permanent, passwordless "root" access to a system. This rule correlates the initiator process with the file modification event to identify the source of the change.
This rule detects the creation, modification, or renaming of directories related to the malicious 'plain-crypto-js' npm package within a 'node_modules' folder. This activity is indicative of a supply chain compromise where a legitimate package (Axios) was found to include this malicious dependency.
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