Rule History

alert tls $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Cobalt Strike Domain (abcdefghijkzz123 .servicedesks .net) in TLS SNI"; flow:established,to_server; tls.sni; bsize:33; content:"abcdefghijkzz123.servicedesks.net"; fast_pattern; reference:md5,41331e4fe36a5a74a87c0eeaa0427184; classtype:trojan-activity; sid:2052955; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2024_05_29, deployment Perimeter, malware_family Cobalt_Strike, performance_impact Low, confidence High, signature_severity Major, updated_at 2024_05_29, reviewed_at 2024_10_04;)