Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed DangerousPassword APT Related Domain (cop .osonlines .co in TLS SNI)"; flow:established,to_server; tls.sni; content:"cop.osonlines.co"; bsize:16; fast_pattern; reference:url,twitter.com/cyber__sloth/status/1498698178585104385; classtype:domain-c2; sid:2035382; rev:1; metadata:created_at 2022_03_02, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_02, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)