Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects execution of shell commands containing obfuscated patterns (such as base64 decoding, hex character sequences, or piped commands) when spawned by core Citrix NetScaler service processes (nsppe, httpd, or nsaaad). This behavior is often indicative of exploitation attempts or post-exploitation activities on network appliances.
Detects unauthorized access to or generation of Citrix NetScaler core dump files, trace outputs, or memory diagnostic artifacts. These artifacts are high-value targets for attackers, such as those exploiting CVE-2026-88772, who attempt to extract session tokens, credentials, and sensitive data residing in memory via these diagnostic mechanisms.
Detects command-line activity attempting to disable, unbind, or remove NetScaler AppFW (Web Application Firewall) profiles, signatures, or security policies. This activity is indicative of defense evasion following the exploitation of CVE-2026-88771 or CVE-2026-88772 to suppress security alerting on follow-on malicious activity.
Detects high volumes of DTLS/UDP session-initiation traffic targeting NetScaler VPN virtual servers that are immediately followed by appliance-level error logs or crashes. This behavior is indicative of active probing or exploitation attempts, such as those associated with CVE-2026-88772, where malicious payloads cause service instability.
Detects web server processes (e.g., IIS w3wp.exe, Apache, Nginx, PHP-FPM) spawning suspicious child processes such as command shells (cmd, powershell, bash, sh), network utilities (curl, wget), or interpreters (python, perl). This behavior is strongly indicative of exploitation of a public-facing web application and the subsequent execution of a webshell or post-exploitation command activity.
Detects DNS resolution attempts for newly registered or suspicious top-level domains (e.g., .xyz, .top, .live) that mimic corporate Identity Provider (IdP) or Single Sign-On (SSO) login portals. This behavior is characteristic of Adversary-in-the-Middle (AiTM) phishing kits like EvilProxy or Tycoon2FA, intended to capture user session tokens. Note: This rule monitors for initial domain contact and should be correlated with subsequent authentication logs to identify potential session hijacking.
Detects git checkout of a bare 40-hex commit SHA or the literal FETCH_HEAD ref, executed by a recognized AI coding-agent process. Narrowed to the Plugin4Shell exploitation fingerprint (checkout of a pinned-SHA-shaped or FETCH_HEAD ref) rather than ordinary branch/tag checkouts, which these agents perform constantly during normal plugin installs.
This rule detects a high frequency of SMB (port 445) connection attempts from a single internal source host to a large number of distinct internal destination hosts within a short timespan. This activity is indicative of internal network scanning, host discovery, or automated lateral movement attempts using SMB.
Detects unauthorized attempts to access the Ray Dashboard Job Submission API, which is vulnerable to remote code execution (CVE-2023-48022). Attackers can leverage this API endpoint to execute arbitrary commands on the Ray cluster.
Detects unauthorized or external access attempts to the Ollama LLM API service (TCP port 11434). The rule specifically flags POST requests targeting the /api/generate or /api/chat endpoints, which are commonly exposed via misconfiguration or lack of authentication, potentially allowing remote command execution or model exploitation.
Detects an exploitation attempt against PoeLLM or LiteLLM MCP test/connection endpoint using a python3 stdio payload that fetches data from port 81.
Detects the PoeLLM ELF payload (masquerading as libgcrypt) via Italian-language poem/agent log strings and embedded LiteLLM MCP exploit strings
This rule monitors network traffic, DNS queries, and user web clicks to detect interactions with known malicious domains associated with credential harvesting and phishing campaigns, specifically those impersonating security or SSO portals.
Detects command-line activity attempting to disable, unbind, or remove NetScaler AppFW (Web Application Firewall) profiles, signatures, or security policies. This activity is indicative of defense evasion following the exploitation of CVE-2026-88771 or CVE-2026-88772 to suppress security alerting on follow-on malicious activity.
Detects anomalous lateral movement behavior where a successful NetScaler VPN or gateway session is followed immediately by internal remote service logons (RDP, SSH, WinRM) or network connections from the same source IP. This pattern is indicative of potential exploitation of Citrix NetScaler vulnerabilities (e.g., CVE-2026-88771, CVE-2026-88772) or credential abuse to move laterally into the internal environment.
Detects the installation or execution of known MALFEX malicious packages via npm or Node.js, which are used as entry points for polyglot or disguised payload delivery.
This rule detects the use of 'docker cp' or 'sbx cp' commands which are susceptible to the CVE-2026-17106 (CopyEscape) vulnerability. This vulnerability allows a compromised container to perform arbitrary file writes or overwrites on the host system during archive extraction, potentially leading to container escape and privilege escalation by replacing critical system binaries like runc.
This analytic detects suspicious python package installations where the package name resembles popular Python libraries but may be typosquatted or slightly altered.
Typosquatting is a common technique used by attackers to trick users into installing malicious packages that mimic legitimate ones.
This detection leverages Cisco NVM flow telemetry and checks for pip or poetry package managers with the "install" or "add" flags, making outbound connections to package repository such as `pypi.org` with known or suspected typo package names.
Typosquatting is a common technique used by attackers to trick users into installing malicious packages that mimic legitimate ones.
This detection leverages Cisco NVM flow telemetry and checks for pip or poetry package managers with the "install" or "add" flags, making outbound connections to package repository such as `pypi.org` with known or suspected typo package names.
Detects DNS lookups and outbound network connections to known command and control (C2) and staging domains associated with the STAC4924 campaign. The rule performs strict matching on domain names to ensure that subdomains are identified while avoiding false positives from partial string matches within URLs.
Detects unauthenticated path traversal attempts targeting Grav CMS web servers. The rule identifies HTTP requests containing directory traversal sequences (e.g., ../, %2e%2e%2f) directed at sensitive configuration files (.yaml) or directories (/user/config, /system/config), consistent with exploitation patterns such as CVE-2026-42608.
This rule detects potential exploitation attempts targeting the Splunk REST API (CVE-2026-20253) by monitoring for unauthenticated inbound requests to the /services/ path. It specifically looks for requests that lack the required Authorization or Cookie headers.
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