Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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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 specific FTP commands (STOR, RETR, TYPE I) and passive mode responses directed to or originating from identified malicious IP addresses associated with the LucidRook threat actor. This rule monitors for potential file exfiltration, payload retrieval, and command-and-control communication over the FTP protocol.
Detects outbound network traffic associated with identified ClickFix CPaaS payload domains and associated API endpoints. The rule monitors for specific malicious domain contact (comicstar.lat, babybon.cfd, merkantalolol.asia) and the use of the '/api/index.php?a=init' endpoint, which is indicative of the ClickFix payload delivery mechanism.
Detects outbound HTTP requests to 'relay.php' containing a static authorization bearer token 'crpx0_c2_2026', which is associated with the command and control activity of the CRPx0 ransomware family.
Detects outbound HTTP POST requests directed towards Internet Computer Protocol (ICP) canister gateways (e.g., icp0.io, ic0.app) containing specific API path patterns (/api/v2/canister/) used for executing queries or calls. The rule specifically flags traffic lacking common browser-like User-Agent strings, which is a common indicator of automated command-and-control beacons using these services as proxy infrastructure.
This rule detects outbound TLS traffic to the Solana mainnet beta RPC API endpoint (api.mainnet-beta.solana.com). Attackers may abuse legitimate public blockchain infrastructure as a command-and-control channel to bypass traditional network defenses or obfuscate communication.
Detects network beaconing activity associated with the TuxBot v3 IoT botnet. The rule identifies specific User-Agent strings (TuxBot/3, BusyBox wget, Wget/1.x), requests for .elf files, and connections to suspicious top-level domains frequently used for botnet command-and-control (C2) infrastructure.
This rule detects network communication associated with the AMOS (Atomic macOS) Stealer malware. Specifically, it identifies inbound HTTP GET requests directed at the '/api/shell/agent' URI, which is used by the stealer to retrieve instructions or trigger remote shell operations from its command and control (C2) server.
Detects HTTP POST requests targeting the '/api/credentials' path on non-standard port 8133, which is indicative of AMOS (Atomic macOS Stealer) malware exfiltrating stolen credentials to a remote command and control server.
Detects network traffic associated with AMOS (Atomic macOS) Stealer malware, identifying C2 beaconing and tasking requests. The rules specifically monitor POST requests to '/api/t' with JSON payloads and GET requests to '/api/shell/agent' over non-standard ports (excluding 80 and 443).
Detects outbound network traffic matching TLS SNI patterns associated with the Sauron Loader malware, indicating command-and-control (C2) communication. The rule monitors for frequent connections to specific domains (namsb-show, quinlantours, virtual-magic, lahaina-shores) following a defined threshold.
This rule detects the two-stage network behavior of AMOS (Atomic macOS Stealer). First, it identifies the initial C2 registration beaconing to an '/api/t' endpoint. Subsequently, it monitors for an immediate follow-up TLS connection to 'ipinfo.io', which is commonly used by the malware for geolocation and victim system reconnaissance.
Detects multiple HTTP POST requests to a specific credential-related API path (/api/credentials) directed at an external IP address (95.163.153.80) on a non-standard port (8133). This pattern is indicative of potential automated credential exfiltration or brute-force activity.
Detects a pattern of frequent (6 or more per minute) small HTTP POST requests (up to 16KB) targeting specific sensitive API or internal URI paths. The detection logic also filters for traffic originating from a specific Microsoft Edge browser user agent string on Windows 64-bit systems, which may indicate automated data exfiltration, beaconing, or communication with a Command and Control (C2) server.
Detects anomalous network traffic patterns from the legitimate 'rnpkeys.exe' process when side-loaded from the 'ProgramData\keyroll' directory. The rule specifically looks for a sequence of connections matching initial C2 registration (TLV 0x01) followed by consistent, periodic beaconing (TLV 0x02) at an interval indicating automated task polling, rather than single-connection legitimate activity.
This rule monitors the rnpkeys.exe process for suspicious environmental reconnaissance activity, specifically targeting locale/keyboard-layout registry queries or domain enumeration via command-line tools. These activities are identified as occurring in a strict temporal sequence (pre-registration check) shortly before an initial outbound network connection, consistent with the behavior of the Sauron loader malware.
This rule detects two-stage suspicious network activity: first, a POST request to a known Sauron Loader C2 endpoint ('/api/t'), and second, a subsequent TLS connection to 'ipinfo.io' used for geolocation. The correlation is achieved using flowbits to track the infection lifecycle.
Detects network beaconing activity associated with the Sauron Loader malware. The rule monitors HTTPS traffic for specific domain patterns and suspicious TLV (Type-Length-Value) protocol structures, as well as recurring beaconing cadence to identified C2 infrastructure.
Detects network beaconing activity associated with AMOS Stealer command-and-control communication. The rule identifies HTTP POST requests to the '/api/t' path with a JSON content type over port 8133, using a threshold to identify sustained communication patterns.
Detects outbound HTTP requests to a known domain associated with 'ClickFix' campaign activity. The rule identifies attempts to fetch a specific JavaScript tracker file, which is often used in social engineering campaigns to trick users into executing malicious commands in their shell or console.
Detects HTTP POST requests to '/api/credentials' over a non-standard port (8133) typical of AMOS (Atomic macOS Stealer) command and control traffic. The rule specifically looks for established network connections originating from the local network and targeting external hosts, flagging multiple occurrences within a 30-second window.
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