Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
918 detections
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Detects files with specially crafted filenames that embed Base64-encoded bash payloads designed to execute when processed by shell scripts.
These filenames exploit shell interpretation quirks to trigger hidden commands, a technique observed in VShell malware campaigns.
These filenames exploit shell interpretation quirks to trigger hidden commands, a technique observed in VShell malware campaigns.
This rule detects when the Obsidian application (obsidian.exe) spawns common shell or scripting interpreters such as PowerShell, cmd.exe, sh, bash, zsh, or osascript. This activity could indicate malicious code execution originating from a potentially compromised or weaponized Obsidian instance, or an attempt to leverage Obsidian's capabilities for unauthorized command execution. The inclusion of 'osascript' specifically addresses observed macOS attack chains (REF6598).
Detects the use of the env command to invoke a shell. This may indicate an attempt to bypass restricted environments, escalate privileges, or execute arbitrary commands.
Detects suspicious interactive bash as a parent to rather uncommon child processes
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 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 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 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.
This rule detects suspicious activity involving multiple POST requests to Livewire update endpoints on web servers, followed by the spawning of unusual processes from web server parent processes (php, apache, httpd, nginx, php-fpm). The spawned processes of interest include various shells (sh, bash), command-line tools (curl, wget, python, perl, nc), or commands containing base64 encoding, chmod +x, or /tmp/ paths. This behavior could indicate a web shell compromise or successful exploitation leading to command execution.
Detects suspicious network connections to 'sfrclak.com' on port 8000 or command-line activity involving 'curl' targeting 'packages.npm.org' on port 8000, potentially indicating malicious activity such as malware download or command and control communication. The rule specifically looks for various command-line patterns including 'cmd.exe' with PowerShell scripts, 'python' scripts, or 'com.apple.act.mond' related commands.
This rule detects the execution of hidden shell scripts within the `/tmp/` directory on Linux systems, specifically looking for `nohup` commands that launch a shell (`sh` or `bash`) to execute a hidden `.sh` file (e.g., `.eba9ee1e4.sh`). This behavior is indicative of the UAT-10608 / React2Shell threat, often associated with credential harvesting operations.
Detects the installation or execution of compromised npm packages related to the Axios supply chain attack, with execution or reference to the dropped macOS RAT payload.
Detects execution of BRICKSTORM malware components including BRICKSTEAL credential harvester, pg_update, vmp utilities, and SLAYSTYLE tools used in vSphere infrastructure attacks.
This rule detects the multi-stage installation and command-and-control (C2) activities associated with GhostClaw or GhostLoader malware on macOS systems. It correlates suspicious process executions, such as curl-based bootstrap, install.sh execution, user-space Node.js setup, and outbound network traffic to 'trackpipe.dev' with UUID-like pathing or specific NODE_CHANNEL values. The rule looks for a combination of at least three of these indicators within a two-hour window to reduce false positives.
Detects SessionReaper webshell activity on Magento e-commerce platforms, including process execution from suspicious media directories.
Detects the execution of cat, followed by network connections. Specifically /dev/tcp/ redirection
Detects a script interpreter process (like node.js or bun) spawning a known credential scanning tool (e.g., trufflehog, gitleaks).
This behavior is indicative of an attempt to find and steal secrets, as seen in the "Shai-Hulud: The Second Coming" campaign.
This behavior is indicative of an attempt to find and steal secrets, as seen in the "Shai-Hulud: The Second Coming" campaign.
Detects execution of shell scripts from mounted disk images (DMG), a technique
used to bypass Gatekeeper restrictions after macOS Sequoia updates.
used to bypass Gatekeeper restrictions after macOS Sequoia updates.
Detects the complete CVE-2026-21902 exploitation chain against Juniper Junos OS Evolved On-Box Anomaly Detection Framework. Requires all four steps: command creation, DAG creation, DAG instance scheduling, and commit.
Detects the execution of shell or system utilities (e.g., powershell, cmd, curl) where the parent process is a known AI agent binary like OpenClaw. This activity can indicate that an attacker has compromised the AI agent (e.g., via the ClawJacked vulnerability) and is using its capabilities to execute arbitrary commands, collect data, or exfiltrate information from the host system.
This detection identifies the execution of suspicious shell commands (such as download cradles, reverse shells, or unexpected GUI applications like Calculator) spawned as child processes of the Claude Code CLI ('claude'). This activity is indicative of potential Remote Code Execution (RCE) through the exploitation of malicious hooks in `.claude/settings.json` or malicious MCP server commands, as described in CVE-2025-59536.
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