Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Phantom Captcha Domain (zoomconference .app in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".zoomconference.app"; endswith; fast_pattern; reference:md5,61660f072008998bf57f8ad602408b68; reference:url,www.sentinelone.com/labs/phantomcaptcha-multi-stage-websocket-rat-targets-ukraine-in-single-day-spearphishing-operation/; classtype:trojan-activity; sid:2065354; rev:1; metadata:attack_target Client_Endpoint, created_at 2025_10_23, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_23;)