Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects network activity associated with the OnyxC2 malware, including DNS queries to .top TLDs for beaconing, subsequent HTTP check-ins to .top domains, and known TLS SNI matches for OnyxC2 C2 infrastructure.
This rule detects HTTP POST requests to the 'wp-login.php' endpoint of a WordPress installation where the 'log' (username) and 'pwd' (password) fields are both set to 'admin'. This is a common signature for automated brute-force or credential-stuffing attacks targeting default administrator credentials.
Detects network activity associated with a malicious NPM package (typosquatting) beaconing to a known C2 server (69.48.229.140) and performing command and control operations, including command polling and data exfiltration, specifically from a Node.js environment.
Detects network activity associated with a malicious NPM package (typosquatting) beaconing to a known C2 server (69.48.229.140) and performing command and control operations, including command polling and data exfiltration, specifically from a Node.js environment.
This rule monitors for outbound TCP and HTTP traffic to a known malicious infrastructure hosting a fake or compromised 'Corp MDM' (Mobile Device Management) admin panel, which serves as a Command and Control (C2) channel for spyware.
Detects a burst of Kerberos TGS-REQ (Ticket-Granting Service Request) messages using RC4 encryption (etype 0x17) over UDP or TCP port 88. A high volume of these requests from a single source within a short timeframe is indicative of Kerberoasting, a technique where an attacker requests service tickets to perform offline password cracking of service account credentials.
Detects anomalous MS-DRSR DRSGetNCChanges requests occurring between hosts where the requester is not a recognized Domain Controller. This pattern is commonly used by attackers to perform a DCSync attack, allowing for the replication of sensitive Active Directory data such as user password hashes.
Detects attempts to access or execute a file named 'cmd.jar' within the Cisco Firepower Management Center (FMC) or Cisco Security Manager (CSM) environment. This filename is associated with web shell activities used for unauthorized command execution on vulnerable Cisco appliances.
Detects network traffic associated with the Havoc C2 framework Demon agent. The rules identify specific HTTP request headers, response headers, and URI patterns (such as /funny_cat.gif, /test.txt, and /helloworld.js) used by the agent for beaconing and command-and-control communication.
Detects HTTP GET requests to external services 'trycloudflare.com' or 'workers.dev' that return a file content starting with the 'MZ' and 'PE' header signatures within the first 256 bytes, indicating a Windows executable payload download often associated with AvisLoader activity.
Detects a sequence of Tox P2P protocol packets consisting of a Cookie Request, Cookie Response, and Crypto Handshake within a single network flow. This pattern is indicative of the Tox P2P protocol, which is sometimes abused by malware (e.g., AvisLoader) for command-and-control (C2) communications to evade traditional network inspection.
Detects network traffic attempting to exploit the Dahua CVE-2021-33044 vulnerability, which allows an unauthenticated user to bypass authentication mechanisms on affected NetKeyboard devices.
Detects outbound network traffic over MQTT ports (1883, 8883) to external networks, which may indicate command-and-control beaconing activity, specifically mimicking BambooToken-style behavior.
This rule detects HTTP POST requests to Vercel-hosted domains containing suspected phishing telemetry (such as device fingerprinting, keystrokes, and user agent collection) originated from a Google Sites frame. This is a common pattern for phishing kits masquerading as legitimate Ledger service pages to harvest credentials and hardware information.
Detects HTTP POST requests containing potential credential exfiltration indicators, specifically targeting the '/google.php' endpoint with 'do=login&', 'user=', and 'pass=' parameters. This pattern is associated with FlowerStorm (Storm-1167) AiTM phishing kits.
Detects outbound TCP traffic originating from the internal network destined for a known malicious IP associated with Meterpreter Java payload retrieval and post-exploitation Command and Control (C2) activity, potentially related to PaperCut vulnerability exploitation.
Detects HTTP requests containing malicious JDBC strings targeting PaperCut NG/MF print management software, which are indicative of attempts to exploit authentication bypass and remote code execution vulnerabilities (CVE-2026-81578, CVE-2026-82078).
Detects network activity associated with the FlowerStorm/Storm-1167 phishing campaign. The rule monitors for credential exfiltration to a specific malicious URI (e.g., /google.php) containing login parameters, as well as the delivery of spoofed Microsoft sign-in pages from the associated phishing infrastructure.
Detects HTTP GET requests to '/api.php?t=' containing a 13-digit timestamp identifier, followed by a response body containing 'download_link'. This pattern is indicative of the SilverFox malware relaying instructions or stage-two payload delivery.
Detects network activity (TCP, DNS, TLS, HTTP) associated with the UNC6240 threat actor's infrastructure, specifically targeting communications with known malicious IP addresses and domains used in a campaign leveraging PeopleSoft-related lures.
Detects network communication with 10729e014d0e.skyleen.fr, associated with the SCKIT malware downloading binaries during CI/CD emitter activities. This rule flags potential ingress tool transfers as part of a supply chain compromise campaign identified as 'memos-semi-nuclear'.
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