Arnold Chan
@slazTrusted contributorCompletionist
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Detects an unauthenticated remote code execution attempt against AhsayCBS via the UpdateReceivers.do endpoint using the checkSysPwd parameter, associated with CVE-2026-105133 and CVE-2026-105134.
This rule performs a retrospective sweep for indicators of compromise (IOCs) associated with the DragonForce TURN/MQTT campaign, as detailed in Lab52 threat research. It monitors for file and process activity matching known malicious hashes, as well as network connections to specific domains and URLs associated with the campaign's command-and-control infrastructure.
Detects a multi-stage compromise sequence involving anomalous authentication followed by VPN session establishment and a burst of outbound connections from Citrix ADC/Gateway appliances. Tightened to reduce false positives from legitimate admin access, routine VPN sessions, and authorized appliance telemetry/updates.
Detects indicators associated with the ChatGPT Custom GPT ClickFix campaign across process, network connection, DNS, and HTTP telemetry: known malicious file hashes, C2 IP addresses, the chattypetty.com domain, and known payload-hosting URLs.
This rule detects successful network connections to known malicious IP addresses or the domain 'forgitlab.com', which are associated with the Azazel malware threat infrastructure.
This rule detects known-malicious activity associated with Warlock ransomware and the ToolShell malware campaign (linked to Storm-2603). It monitors for process, file, and image-load events matching identified malicious file hashes, as well as network connection attempts to known malicious domains and URLs. It also includes monitoring for traffic to 'oastify.com', a domain commonly used for Burp Collaborator, which requires correlation with other indicators to confirm malicious intent.
Detects a network connection handshake indicating the use of Chisel, a fast TCP/UDP tunnel over HTTP, specifically identifying potential command-and-control beaconing activity.
Detects a network connection handshake indicating the use of Chisel, a fast TCP/UDP tunnel over HTTP, specifically identifying potential command-and-control beaconing activity.
Detects a network connection handshake indicating the use of Chisel, a fast TCP/UDP tunnel over HTTP, specifically identifying potential command-and-control beaconing activity.
Detects network activity related to the 'Blinder Tunnel' C2 infrastructure. The rules identify a Chisel tunnel client initiating a WebSocket handshake (identifiable by the 'chisel-v3-channel' header) to external infrastructure and a DNS lookup for a specific domain (soroshpasargad.com) identified as a relay nameserver used by the threat actor CL-STA-1178.
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