Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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This rule detects potentially malicious AI prompt injection attempts targeting web-based AI assistants like Microsoft Copilot or Atlassian Rovo. It monitors CommonSecurityLog data for specific URL parameters (rovoChatPrompt, q, prompt) containing suspicious keywords (e.g., 'ignore', 'system', 'exfiltrate') or unusually long parameter values, which are indicators of efforts to bypass AI safety guardrails or perform data exfiltration via prompt manipulation.
Detects the ClickFix TDS (Traffic Direction System) gate, which uses browser-based JavaScript to perform anti-analysis and anti-instrumentation checks. Specifically, it looks for the unauthorized hooking of Array.prototype.includes and the use of canPlayType as a tripwire to detect sandboxes or debuggers, correlated with signs of developer tool usage or prototype property modifications.
Detects HTTP GET requests to a specific Cloudflare Workers domain ('is-01-ast.ols-img-12.workers.dev') used for msaRAT WebRTC signaling, characterized by the presence of spoofed 'Origin' and 'Referer' headers pointing to 'microsoft.com' alongside a 'HeadlessChrome' user agent, indicating malicious command-and-control behavior.
Detects outbound network connections initiated by a process identifying itself as 'HeadlessChrome' within the User-Agent string. This behavior is indicative of a headless browser being misused as a proxy for Command and Control (C2) communication, as observed in msaRAT infections.
Detects HTTP requests for fingerprinted JavaScript/CSS assets shared across UNC6671's cloned SSO and cryptocurrency vault-drainer phishing panels.
Detects HTTP requests to known UNC6671 AiTM reverse-proxy phishing kit IPs on MFA/OTP interception URI paths (push-tap, duo-push, oauth2 2fa, community verify), indicating live MFA bypass.
This rule monitors web browser URL click events for specific patterns (createssopasskey, addssopasskey) often used in vishing-lure campaigns. It identifies potential Adversary-in-the-Middle (AiTM) credential harvesting attempts by cross-referencing clicked URLs against an organization's approved SSO domain allowlist and verifying the presence of an internal referrer in the redirect chain. If a user clicks a suspect link that does not originate from a known internal source and points to an unauthorized external domain, the event is flagged.
Detects malicious heartbeat check-ins to a C2 server endpoint '/api/bot/heartbeat' by monitoring for unauthorized exfiltration of hardware identifiers (Host/Device/HW ID) or potential remote task execution via Base64-encoded instructions in the response body, characteristic of ClickFix-related infostealer campaigns targeting macOS users.
This rule detects potentially malicious AI prompt injection attempts targeting web-based AI assistants like Microsoft Copilot or Atlassian Rovo. It monitors CommonSecurityLog data for specific URL parameters (rovoChatPrompt, q, prompt) containing suspicious keywords (e.g., 'ignore', 'system', 'exfiltrate') or unusually long parameter values, which are indicators of efforts to bypass AI safety guardrails or perform data exfiltration via prompt manipulation.
Detects HTTP outbound traffic to domains using the .sbs TLD that follow a specific 'file' followed by dictionary words naming convention, associated with the ClickFix campaign. The rule specifically identifies staging requests matching a /curl/<hex-id> URI pattern used to deliver secondary payloads.
Detects outbound HTTP POST requests associated with the ChainDrop/Shai-Hulud malware family. The rule looks for 'eth_call' JSON-RPC method calls targeting a specific Ethereum smart contract address known to be used for EtherHiding C2 infrastructure, where malicious payloads or commands are embedded within blockchain interactions.
This rule detects suspicious outbound HTTP POST requests containing specific JSON fingerprint payloads associated with ClickFix campaigns. The fingerprint contains a mode set to 'php', typically delivered via hidden, auto-submitting forms on malicious domains to profile victims or deliver secondary payloads.
This rule detects outbound network traffic indicative of AI token jacking, where compromised API keys are utilized through unauthorized gray-market proxy platforms. It identifies requests originating from internal hosts using the specific, anomalous User-Agent string 'Go-http-client/2.0,gzip(gfe)' in conjunction with HTTP host headers associated with known AI 'transfer-station' services such as 'new-api' or 'one-api'. This signature is designed to distinguish malicious exploitation from benign Go-based service traffic, while explicitly excluding known internal service accounts to minimize false positives.
Detects outbound HTTP POST requests associated with the ChainDrop/Shai-Hulud malware family. The rule looks for 'eth_call' JSON-RPC method calls targeting a specific Ethereum smart contract address known to be used for EtherHiding C2 infrastructure, where malicious payloads or commands are embedded within blockchain interactions.
This rule detects potential Web Proxy Auto-Discovery (WPAD) abuse by monitoring for network requests to 'wpad.dat' or 'wpad' resources on port 80, specifically on endpoints that have been tagged as connected to untrusted or public networks (e.g., guest, hotel, public). WPAD abuse is a common technique used by attackers to force devices to use a malicious proxy, enabling traffic interception and potential credential theft.
Detects a specific fingerprinting activity by the ClickFix Traffic Direction System (TDS) within HTTP POST request bodies. The rule identifies the combination of 'mode:php', a 'MacIntel' platform string (spoof-check), and WebGL rendering fields ('webglVendor', 'webglRenderer') in a JSON-encoded body, which is characteristic of the macOS ClickFix infostealer campaign delivery.
Detects a multi-stage exploitation chain for CVE-2026-15410 targeting SonicWall SMA 1000 appliances. It correlates web request logs containing path traversal sequences in a hotfix parameter, associated application log entries indicating removal of a hotfix referencing a temporary file, and subsequent system shutdown commands executed with root privileges, indicating successful privilege escalation and system compromise.
Detects HTTP GET requests to UNC6692 Edgecution phishing landing pages hosted on S3 buckets using the 'service-page-*-outlook.s3.us-west-2.amazonaws.com' naming pattern with an 'email=' parameter and '/update.html' URI, used to lure victims into downloading the Edgecution malware suite via fake Outlook/Mailbox Repair Utility pages.
Persistent multi-day exfil retry with per-package tracking ID beacon
Detects incoming web requests (via URI queries or form data) containing common OS command injection characters, shell metacharacters, or command execution patterns indicative of attempts to execute unauthorized commands on the underlying web server.
Detects HTTP POST requests to an Apache Tomcat server containing a Java serialized-object header (AC ED 00 05) in a request body larger than 512 bytes, consistent with CVE-2026-34486 deserialization exploitation.
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