Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects a sequence of events where a non-root user attempts to manipulate kernel components (specifically involving xfrm/esp modules via ip or modprobe) followed immediately by a sudo or su command, suggesting an attempt to load malicious kernel modules or exploit kernel vulnerabilities to escalate privileges.
Detects the creation or modification of a file named 'maisum.dat', which has been associated with malicious activity and malware behavior.
Identifies post-exploitation reverse shells resulting from the LiteLLM RCE vulnerabilities. The rule looks for processes initiated by 'litellm' (either directly or via python running litellm) that then spawn child processes with common reverse shell command line patterns such as 'bash -i', '/dev/tcp/', 'nc -e', or 'sh -i'.
Detects post-exploitation persistence activity following a DirtyClone (CVE-2026-43503) privilege escalation. The rule monitors for the creation of local user accounts via binaries like useradd and usermod, as well as unauthorized modifications to sensitive Linux configuration files such as /etc/sudoers or /etc/shadow, specifically when executed with root-level privileges.
ClickFix style social engineering cluster delivering Mistic and ModeloRAT
Infostealer distributed via fake open-source tool impersonation sites
High-velocity ransomware-as-a-service with aggressive leak-site extortion
High-velocity ransomware-as-a-service with aggressive leak-site extortion
Ransomware group exploiting edge devices and managed file transfer software
Rust-based ransomware family targeting enterprise environments
Ransomware group exploiting edge devices and managed file transfer software
Rust-based ransomware family targeting enterprise environments
Detects instances where package managers like npm, pip, or python execute shells or scripting interpreters with command-line arguments indicative of software installation or build processes. This pattern is common in supply chain attacks where malicious packages run code during their installation phase.
Detects anomalous process spawning where VS Code or Amazon Q language server processes (e.g., node, amazonq-lsp) execute shell utilities (e.g., bash, curl) with arguments related to .amazonq/mcp.json or specific credential/exfiltration commands. This behavior is associated with the exploitation of the MCP server auto-execution vulnerability (CVE-2026-12957).
Detects unauthorized or suspicious modifications to critical Linux configuration directories (e.g., cron, rc, init, ipsec) or specific application-related paths by processes not typically associated with system management or package maintenance. The rule further elevates risk when specific indicators like LD_PRELOAD, LD_LIBRARY_PATH, or known malicious string artifacts are present in the command line or file path.
Detects the execution of known exploit binaries or the compilation of source files associated with the Linux PACKET_EDIT_MEME exploit (CVE-2026-46331). The rule monitors for specific binary names associated with the exploit, execution of these binaries from common staging directories (/tmp, /dev/shm, /run), and the use of GCC or CC compilers to build the exploit source files.
Detects unauthorized shells (bash, sh, dash, zsh) spawned as root from common setuid binaries (su, sudo, newgrp) by an unprivileged user. This behavior is indicative of the CVE-2026-46331 'pedit COW' vulnerability, where a local attacker performs page cache poisoning on a setuid binary to execute arbitrary code as root without disk modification.
Detects unauthorized access and command execution associated with MSP service accounts. The rule triggers on successful SSH authentication using specific service account names (e.g., egnyteservice) followed by the execution of interactive shells under those same service account contexts, which is indicative of potential lateral movement or compromise in downstream environments.
Detects signs of the VerdantBamboo threat actor's BRICKSTORM/PLENET campaign, specifically targeting Linux-based edge appliances like pfSense and Synology NAS. The rule monitors for sudo abuse by specific service accounts (e.g., egnyteservice, www-data) attempting to leverage NOPASSWD sudo privileges for the 'tee' utility to write malicious content into sensitive system files (e.g., /usr/sbin/, /etc/cron.d/, /etc/sudoers). Additionally, it identifies unauthorized sudo enumeration commands that may indicate early-stage reconnaissance or persistence efforts.
Detects SSH, SFTP, or SCP connections originating from internal edge appliances such as pfSense firewalls or Synology NAS devices directed at internal network hosts. This activity is consistent with VerdantBamboo BRICKSTORM lateral movement, where compromised edge infrastructure is leveraged as a pivot point to gain access to the internal network.
Detects the execution and download of the 'isp.sh' shell dropper and the 'lambsys' Go-based cryptominer binary on Linux systems. This rule monitors for common dropper patterns, including shell execution of piped commands, use of curl/wget to fetch known malicious components, and instances where Langflow processes attempt to spawn shell-related child processes for potential payload execution.
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