Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
140 detections
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Detects outbound HTTP POST beaconing behavior to a known C2 IP address associated with the StealC malware and ClickFix campaign. This rule monitors for established connections to the hardcoded infrastructure used for exfiltrating data or receiving commands.
This rule detects outbound TLS connections from the internal network to external destinations where the server certificate is self-signed. It identifies connections where both the certificate issuer and subject common names (CN) are present, which is often indicative of opportunistic encryption used by C2 infrastructure or malicious payloads. The rule includes a threshold to reduce noise by limiting alerts for the same source over a specific window.
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 outbound network connections (both TCP and TLS) from internal hosts to known command-and-control (C2) infrastructure associated with the SparroWocky malware family. This rule monitors for established connections to a curated list of malicious IP addresses over ports 443 and 8080.
Detects outbound TLS connections from internal hosts to known IP addresses associated with the SparroWocky command-and-control infrastructure, including the specific byte sequence used during the TLS handshake to signal a ready state.
Detects network traffic on TCP port 3308 consistent with VectraRAT beaconing, utilizing MessagePack-over-TCP. The rule monitors for established connections to external networks with specific stream size and content characteristics typical of this C2 communication channel.
Detects network traffic on TCP port 3308 consistent with VectraRAT beaconing, utilizing MessagePack-over-TCP. The rule monitors for established connections to external networks with specific stream size and content characteristics typical of this C2 communication channel.
Detects network traffic on TCP port 3308 consistent with VectraRAT beaconing, utilizing MessagePack-over-TCP. The rule monitors for established connections to external networks with specific stream size and content characteristics typical of this C2 communication channel.
Detects network traffic on TCP port 3308 consistent with VectraRAT beaconing, utilizing MessagePack-over-TCP. The rule monitors for established connections to external networks with specific stream size and content characteristics typical of this C2 communication channel.
This rule identifies potential command-and-control (C2) beaconing behavior by detecting repetitive, consistent connections (low jitter) to public IP addresses over common TLS ports (443, 8443, 4443, 9443) from processes that do not have a known history of connecting to those destinations. It establishes a baseline of historical connections to filter out legitimate traffic and uses a statistical analysis of connection intervals to highlight suspicious, non-human-like automated communication patterns.
Detects DNS A record lookups for the domain 'mail.uaiubifas.top', which is associated with GRAYRABBIT C2 activity linked to UNC3569. This domain is known to be used for command and control communications.
Detects DNS A record lookups for the domain 'mail.uaiubifas.top', which is associated with GRAYRABBIT C2 activity linked to UNC3569. This domain is known to be used for command and control communications.
Detects DNS A record lookups for the domain 'mail.uaiubifas.top', which is associated with GRAYRABBIT C2 activity linked to UNC3569. This domain is known to be used for command and control communications.
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 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 network activity associated with the ProRAM C2 infrastructure. The rule monitors for DNS resolutions, TLS SNI field matches, and specific HTTP WebSocket upgrade patterns directed towards the 'clash-verge-upgrade.com' domain.
Detects network activity associated with the ProRAM C2 infrastructure. The rule monitors for DNS resolutions, TLS SNI field matches, and specific HTTP WebSocket upgrade patterns directed towards the 'clash-verge-upgrade.com' domain.
Detects outbound network traffic from internal hosts to the HiveMQ public broker using the MQTT protocol over TLS, a behavior associated with the Toy Ghouls mqtt-bird-agent C2 infrastructure.
Detects outbound network traffic associated with StyleSmuggler C2 infrastructure. The rule identifies established TLS connections to a known malicious IP address (99.84.67.186) and monitors for WebSocket-over-TLS traffic using the suspicious SNI 'windwsecurity.run'.
Detects outbound network traffic associated with StyleSmuggler C2 infrastructure. The rule identifies established TLS connections to a known malicious IP address (99.84.67.186) and monitors for WebSocket-over-TLS traffic using the suspicious SNI 'windwsecurity.run'.
Detects outbound HTTP POST requests to known SynkLoader C2 domains or URI patterns, characterized by 'application/octet-stream' Content-Type headers. The rule targets specific hardcoded domains used by the malware and a suspicious nested URI path pattern commonly associated with its beaconing behavior.
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