Versions (4)
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Rev: 1 • Feb 6, 2024, 12:00 PMET MALWARE Observed Malware Delivery Domain (a0917004 .xsph .ru in TLS SNI)
alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malware Delivery Domain (a0917004 .xsph .ru in TLS SNI)"; flow:established,to_server; tls.sni; bsize:16; content:"a0917004.xsph.ru"; fast_pattern; reference:url,twitter.com/Cyber0verload/status/1754913588748116080; classtype:trojan-activity; sid:2050735; rev:1; metadata:attack_target Client_Endpoint, created_at 2024_02_06, deployment Perimeter, malware_family Xworm, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_02_06, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)
Feb 6, 2024, 12:00 PM
Feb 6, 2024, 12:00 PM
Sep 21, 2024, 3:00 AM
Aug 14, 2025, 9:34 PM
rules/emerging-malware.rules