Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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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 network activity (DNS queries, TLS SNI, and HTTP requests) associated with identified 'ShipmentsFree' scam domains. These domains are typically used in phishing or credential harvesting campaigns to trick users into visiting fake account or tracking pages.
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 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 outbound HTTP POST requests to a URI path '/google.php' containing suspicious parameters 'do=login&user=' and '&pass='. This pattern is indicative of credential exfiltration activities commonly associated with the FlowerStorm campaign.
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 DNS queries and TLS SNI traffic directed at known actor-controlled domains and subdomains associated with ScreenConnect remote management software usage in malicious RMM chains.
Detects DNS queries and TLS SNI traffic directed at known actor-controlled domains and subdomains associated with ScreenConnect remote management software usage in malicious RMM chains.
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'.
Detects exfiltration of sensitive information, including Dahua camera credentials and internal identifiers, to the Telegram Bot API over HTTPS. These rules monitor for specific API endpoints (/sendPhoto) and common credential patterns (Login:, Password:, Model:) or indicators (Shodan links, VKontakte references) within HTTP POST requests directed toward api.telegram.org.
Detects attempts to exploit CVE-2021-33044, an authentication bypass vulnerability in Dahua NetKeyboard hardware. The rule triggers when a POST request containing 'global.login', 'clientType: NetKeyboard', and 'loginType: Direct' is observed, which allows unauthorized access by manipulating authentication parameters.
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