Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Lazarus Related Domain (docs .gsheetpage .com in TLS SNI)"; flow:established,to_server; tls.sni; content:"docs.gsheetpage.com"; bsize:19; fast_pattern; reference:md5,42e6310ffbdd24cf9a2b5d200190359e; reference:url,twitter.com/ShadowChasing1/status/1447900397935362053; classtype:trojan-activity; sid:2034176; rev:1; metadata:attack_target Client_Endpoint, created_at 2021_10_12, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_12, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;)