Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects potential malicious activity related to the XCSSET macOS malware, which leverages Xcode projects to execute malicious payloads. The rule monitors for suspicious process execution (e.g., curl, osascript, zsh) initiated by Xcode-related processes, and unusual modifications to .zshrc files by processes other than standard shells or editors.
Detects potential malicious activity related to the XCSSET macOS malware, which leverages Xcode projects to execute malicious payloads. The rule monitors for suspicious process execution (e.g., curl, osascript, zsh) initiated by Xcode-related processes, and unusual modifications to .zshrc files by processes other than standard shells or editors.
Detects XCSSET disabling macOS SoftwareUpdate ConfigDataInstall and Rapid Security Response settings via defaults write, impairing automatic security patching, while excluding known MDM management tools.
Detects an Xcode project or Git repository build-phase/pre-commit hook triggering an initial C2 beacon via curl GET /a?p=xcode_phase to retrieve the next infection stage.
Detects osascript executed with -e combined with a curl subprocess or parent process, matching XCSSET's fileless AppleScript execution pattern that fetches and runs code in memory without touching disk.
Detects the XCSSET fileless persistence pattern of writing/reading a Base64-encoded payload to a macOS 'defaults' preference domain and piping it directly to a shell interpreter.
Detects the XCSSET chrome_remote backdoor spawning a shell via exec.Command in response to a console.log delimiter-prefixed command, implementing a fileless reverse shell over the CDP channel.
Detects XCSSET resetting the TCC AppleEvents permission database via tccutil resetAppleEvents correlated with a subsequent fake System Settings/Xcode consent prompt, excluding known MDM tooling.
Detects XCSSET resetting the TCC AppleEvents permission database via tccutil resetAppleEvents correlated with a subsequent fake System Settings/Xcode consent prompt, excluding known MDM tooling.
Detects malicious .zshrc modifications appending a Base64-decode-and-pipe-to-shell or C2 curl pattern, correlated with Dock persistent-app entries pointing to non-standard/temp paths.
Detects osascript executed with -e combined with a curl subprocess or parent process, matching XCSSET's fileless AppleScript execution pattern that fetches and runs code in memory without touching disk.
Detects the XCSSET fileless persistence pattern of writing/reading a Base64-encoded payload to a macOS 'defaults' preference domain and piping it directly to a shell interpreter.
Detects malicious .zshrc modifications appending a Base64-decode-and-pipe-to-shell or C2 curl pattern, correlated with Dock persistent-app entries pointing to non-standard/temp paths.
Detects an Xcode project or Git repository build-phase/pre-commit hook triggering an initial C2 beacon via curl GET /a?p=xcode_phase to retrieve the next infection stage.
Detects XCSSET disabling macOS SoftwareUpdate ConfigDataInstall and Rapid Security Response settings via defaults write, impairing automatic security patching, while excluding known MDM management tools.
Detects the XCSSET chrome_remote backdoor spawning a shell via exec.Command in response to a console.log delimiter-prefixed command, implementing a fileless reverse shell over the CDP channel.
Detects the execution traces of the WizardUpdate malware, a macOS trojan that attempts to infiltrate macOS machines to steal data and is associated with other types of malicious payloads. The rule specifically looks for shell commands executing `curl` with a specific pattern (`=$(curl ` and `eval`) or `curl` commands containing `_intermediate_agent_`.
This rule detects the execution of 'osacompile' and 'curl' in the same command line. This combination is indicative of in-memory downloading and compiling of applets, a technique observed in the XCSSET malware. 'curl' is used to download content, and 'osacompile' is used to compile AppleScript or JavaScript for Automation (JXA) scripts, which can then be executed.
This rule identifies execution traces indicative of the XCSSET macOS malware. XCSSET is known to spread via Xcode projects and maliciously modify applications. The rule looks for specific command-line patterns involving 'curl' to suspicious URLs, 'osacompile' and 'plutil' interacting with user and group containers, and 'zip' archiving data from user and group containers. These activities suggest potential command and control communication, persistence mechanisms, and data staging/exfiltration by the malware.