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SID: 2055448 • Source: et/open

Versions (4)

Version DetailsCurrent

Rev: 2Aug 23, 2024, 12:00 PM

ET MALWARE Observed Malicious Domain (jslibc .com in TLS SNI)

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Malicious Domain (jslibc .com in TLS SNI)"; flow:established,to_server; tls.sni; dotprefix; content:".jslibc.com"; endswith; fast_pattern; reference:url,x.com/malwrhunterteam/status/1826882222323794335; classtype:trojan-activity; sid:2055448; rev:2; metadata:attack_target Client_Endpoint, created_at 2024_08_23, deployment Perimeter, deprecation_reason Age, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_04_15, reviewed_at 2025_04_15, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)

Aug 23, 2024, 12:00 PM

Apr 15, 2025, 12:00 PM

Sep 21, 2024, 3:00 AM

Jul 29, 2025, 10:34 PM

rules/emerging-malware.rules