ET MALWARE Observed Phantom Captcha Domain (zoomconference .click in TLS SNI)
Sourceet/open
CreatedOctober 23, 2025
UpdatedOctober 23, 2025
Classificationtrojan-activity
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Phantom Captcha Domain (zoomconference .click in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".zoomconference.click"; 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:2065351; 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;)
References
| md5 | 61660f072008998bf57f8ad602408b68 |
| url | www.sentinelone.com/labs/phantomcaptcha-multi-stage-websocket-rat-targets-ukraine-in-single-day-spearphishing-operation/ |
Metadata
attack targetClient_Endpoint
created at2025_10_23
deploymentPerimeter
confidenceHigh
signature severityMajor
tagDescription_Generated_By_Proofpoint_Nexus
updated at2025_10_23
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