Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects high-volume DNS traffic characterized by long, high-entropy subdomain labels, which are often used as a mechanism for command-and-control (C2) communication or data exfiltration via DNS tunneling.
This rule detects network activity associated with the GemStuffer malware, specifically monitoring for DNS queries to known OAST callback domains, HTTP requests to specific C2 paths, and unauthorized data exfiltration attempts to the webhook.site service.
Detects DNS queries and TLS SNI traffic directed towards the suspicious domain 'corp.tripswithengine.com', which is associated with the NeedyMantis malware C2 infrastructure.
Detects network activity (DNS queries, TLS SNI, and HTTP Host headers) associated with known RedFlick command-and-control (C2) infrastructure domains: etia.ca, groy.cc, and secure-dns-hub.com.
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 high-frequency DNS NXDOMAIN responses for domains exhibiting patterns indicative of Domain Generation Algorithms (DGA), specifically fixed-length, high-entropy character strings. This behavior is commonly associated with botnets attempting to locate command and control infrastructure.
Detects DNS queries attempting to resolve domains associated with malicious LLM-as-a-service platforms, specifically targeting domains containing 'wormgpt', 'fraudgpt', or 'evilgpt'. These platforms are often used by adversaries to facilitate automated social engineering, malware development, or other malicious activities.
This rule detects DNS queries, TLS SNI, and HTTP requests to a list of known malicious domains associated with the STAC4924 threat activity, specifically linked to the TerminalFix or Lorem Ipsum Loader malware.
Detects network indicators associated with the BambooToken C2 infrastructure, including DNS lookups for specific domains, TLS SNI mismatches, non-standard MQTT port usage, and specific command-and-control tasking keywords within MQTT payloads.
Detects DNS queries to major public LLM API endpoints (OpenAI, Anthropic, Google Generative Language). This may indicate potential use of these services as a command and control (C2) channel or for data exfiltration by insiders or compromised systems, which may bypass traditional security controls.
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.
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 DNS queries for the domain 'phf-ubp.com', which is associated with fraudulent HTS infrastructure. This rule monitors network traffic for indicators of communication with known malicious infrastructure.
This rule detects potential automated subdomain enumeration by monitoring for a high volume of DNS queries (200 or more within 60 seconds) originating from a single host. Such behavior is characteristic of reconnaissance activities used to discover subdomains and map out network infrastructure.
Detects DNS queries with abnormally long subdomains matching patterns frequently used by Cobalt Strike DNS Beacons for command-and-control communications. The rule identifies hexadecimal or base32 encoded strings within subdomains that exceed 40 characters in length and occur frequently within a short time window.
Detects DNS queries for RatHat C2 panels using characteristic naming patterns and specific malicious domains, as well as outbound network connections to known RatHat C2 IP infrastructure.
Detects DNS queries and HTTP requests associated with the OnyxC2 command and control infrastructure, including specific hardcoded domains and suspicious DNS traffic targeting newly-abused top-level domains (.top, .cyou, .lol).
Detects DNS queries, TLS SNI headers, and HTTP host headers associated with the known exfiltration domain 't.m-kosche.com' linked to the Mini Shai-Hulud malware.
Detects network traffic (DNS queries, TLS SNI, and HTTP Host headers) associated with the known TukTuk C2 infrastructure domain 'borjumaniya.store'.
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