Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Cobalt Strike Malleable C2 (Havex APT)"; flow:established,to_server; http.request_line; content:"GET|20|/include/template/isx.php|20|HTTP/1.1"; fast_pattern; bsize:38; http.cookie; bsize:172; content:"="; offset:171; depth:1; endswith; pcre:"/^[a-zA-Z0-9\/+]{171}=$/"; http.user_agent; content:" Java/"; reference:url,github.com/rsmudge/Malleable-C2-Profiles/blob/master/APT/havex.profile; classtype:command-and-control; sid:2029740; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_03_26, deployment Perimeter, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, updated_at 2020_03_26, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1001, mitre_technique_name Data_Obfuscation;)