Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
926 detections
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Detects the execution of the 'fanout.sh' utility from the /tmp directory, which subsequently spawns 'sshpass' child processes to perform rapid, non-interactive SSH authentication attempts ('StrictHostKeyChecking=no') against multiple internal hosts within a 10-minute window. This behavior is indicative of automated lateral movement, specifically observed by threat actor UNC6240.
Detects suspicious child processes such as shell interpreters, download utilities, and base64-decoded commands spawned from core Citrix NetScaler processes (nsppe, httpd, aoacli, nscli). This pattern is often indicative of post-exploitation command execution following an exploitation of remote code execution (RCE) vulnerabilities.
Detects high-risk administrative activity on VMware ESXi or vCenter servers that is consistent with pre-ransomware staging, such as disabling lockdown mode, disabling syslog forwarding, mass deletion or modification of virtual machine files (.vmdk/.vmx), or shell command execution related to encryption tool staging.
Detects various techniques used to escape from Linux container isolation, including accessing container daemon control sockets (Docker/containerd), abusing namespace operations (nsenter/setns), mounting sensitive host filesystem paths (e.g., /proc/1/root), performing chroot escapes, and abusing privileged capabilities or socket-based execution.
Detects attempts to exploit an unauthenticated OS command injection vulnerability in Cisco ISE (CVE-2026-20130). The rule monitors inbound HTTP traffic for shell metacharacters and common command-line binaries in the URI or request body, indicating an attempt to execute arbitrary commands on the underlying host.
Detects a suspicious sequence of events where a known web server process (e.g., IIS, Nginx, Apache) spawns a command shell process, followed shortly by the creation of a file with a web shell-like extension (.aspx, .jsp, .php) in the same environment. This pattern is indicative of an adversary exploiting a public-facing application to upload and potentially access a web shell.
Detects potential exfiltration staging by copying files from Windows mounts (/mnt/) into the WSL Linux filesystem using wsl.exe -e cp/mv
This analytic detects the macOS osascript utility being used with an interactive Bash invocation, identified by the presence
of "bash -i" in the command line.
Adversaries may abuse osascript and AppleScript's shell execution capabilities to launch
interactive shells, establish remote access, or execute post-exploitation commands.
of "bash -i" in the command line.
Adversaries may abuse osascript and AppleScript's shell execution capabilities to launch
interactive shells, establish remote access, or execute post-exploitation commands.
Detects instances where the 'curl' utility is used to download files while simultaneously piping the output directly into a shell interpreter (bash/sh) or using download flags ('-o', '-O') in a way that suggests staging or immediate execution of remote scripts, often associated with force-flag bypass patterns.
Detects suspicious command line patterns on macOS where base64 encoded strings are decoded and piped directly into a shell interpreter (bash/zsh/sh). This pattern is commonly used by adversaries to execute obfuscated payloads or scripts directly in memory.
This rule detects attempts to exploit a command injection vulnerability (CVE-2026-49869) in the Kestra workflow automation platform. The rule monitors HTTP POST requests to the '/api/v1/flows' endpoint, identifying payloads that define flow types involving shell or execution plugins and contain suspicious command sequences (e.g., shell operators combined with common system utilities like nc, bash, or curl).
Detects files, such as container image layers or extracted binaries, that contain a combination of CARBONATO botnet registry infrastructure artifacts and cryptocurrency wallet application strings. This indicates the presence of a trojanized wallet application originating from the CARBONATO operators' unauthenticated registry infrastructure.
Detects Android malware attempting to abuse accessibility services or system settings to enable wireless debugging and spawn an ADB shell with elevated privileges. This behavior is indicative of unauthorized control over the device via Android Debug Bridge (ADB).
Detects the execution of bash commands that contain base64 decoding flags, typically used to obfuscate command-line arguments to evade detection, initiated from a terminal application.
Detects suspicious execution patterns on macOS where the Terminal application launches a bash process executing base64-encoded commands. This behavior is indicative of the ClickFix campaign, where users are prompted to copy and paste malicious obfuscated scripts into the terminal, often under the guise of a reCAPTCHA verification.
Detects a suspicious sequence of events where a known web server process (e.g., IIS, Nginx, Apache) spawns a command shell process, followed shortly by the creation of a file with a web shell-like extension (.aspx, .jsp, .php) in the same environment. This pattern is indicative of an adversary exploiting a public-facing application to upload and potentially access a web shell.
Detects anomalous, high-volume HTTP requests to AI agent orchestration endpoints (e.g., tool invocation, plugins, or webhooks) followed by suspicious process execution or outbound network connections from the same host. This behavior is indicative of RCE exploitation against an AI agent framework, such as insecure deserialization or SSRF within a plugin connector.
Detects the execution of command shells or common post-exploitation utilities as child processes of network appliance management services (e.g., VPN gateways, firewalls, web servers). This pattern indicates potential exploitation of public-facing infrastructure where an attacker achieves code execution through the management daemon or its web components.
Detects evidence of the SCKit supply chain worm within GitHub Actions CI pipelines. The rule identifies attempts to poison the build process by injecting a BASH_ENV path into GITHUB_ENV, which forces the execution of a malicious script (sckit-publish-bridge.sh) during subsequent shell steps. This script is designed to exfiltrate npm publishing credentials (NODE_AUTH_TOKEN) to external infrastructure. The detection logic covers both the injection mechanism and diagnostic output indicators from the bridge script.
This rule detects activities associated with the MacSync backdoor, specifically focusing on persistence mechanisms such as LaunchAgent manipulation, .repair-run scripts, and suspicious GIT hook usage. It also correlates these events with the termination of macOS notification agents (BTMNotificationAgent, NotificationCenter, BackgroundTaskManagementAgent), which is a tactic used to suppress security alerts during malicious operations.
Detects post-exploitation activity against Citrix NetScaler appliances associated with CVE-2026-8452. The rule specifically monitors for HTTP GET requests targeting PHP files within the /var/vpn/theme/ directory, accompanied by efforts to execute shell commands (bin/sh) via the web server.
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