Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects an inbound Microsoft Teams call or chat using a known STAC4749 helpdesk-impersonation persona display name, a caller UPN on a known STAC4749 .top IT-themed domain, or a source IP previously observed originating STAC4749 vishing calls.
Detects an inbound Microsoft Teams call or chat using a known STAC4749 helpdesk-impersonation persona display name, a caller UPN on a known STAC4749 .top IT-themed domain, or a source IP previously observed originating STAC4749 vishing calls.
Correlates an external Microsoft Teams helpdesk-impersonation contact event with subsequent remote access tool installation (Quick Assist/RemSupp/DWAgent/AnyDesk) and Chaos ransomware encryption/ransom note deployment (readme.chaos.txt) occurring within a 17-hour window, consistent with the STAC4749 campaign's observed under-17-hour intrusion-to-encryption timeline.
Correlates an external Microsoft Teams helpdesk-impersonation contact event with subsequent remote access tool installation (Quick Assist/RemSupp/DWAgent/AnyDesk) and Chaos ransomware encryption/ransom note deployment (readme.chaos.txt) occurring within a 17-hour window, consistent with the STAC4749 campaign's observed under-17-hour intrusion-to-encryption timeline.
Correlates an external Microsoft Teams helpdesk-impersonation contact event with subsequent remote access tool installation (Quick Assist/RemSupp/DWAgent/AnyDesk) and Chaos ransomware encryption/ransom note deployment (readme.chaos.txt) occurring within a 17-hour window, consistent with the STAC4749 campaign's observed under-17-hour intrusion-to-encryption timeline.
Detects an inbound Microsoft Teams call or chat using a known STAC4749 helpdesk-impersonation persona display name, a caller UPN on a known STAC4749 .top IT-themed domain, or a source IP previously observed originating STAC4749 vishing calls.