alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED W32.Blackshades/Shadesrat Backdoor CnC Beacon"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/gate.php"; http.request_body; content:"crypt"; depth:5; content:"="; within:3; reference:md5,9d11cfb7799089823483b72daec5fd2b; reference:md5,a01451eae2d47872ce796bb85f116710; classtype:command-and-control; sid:2018079; rev:4; metadata:attack_target Client_Endpoint, tls_state plaintext, created_at 2014_02_05, deployment Perimeter, former_category MALWARE, confidence High, signature_severity Major, tag c2, updated_at 2024_12_05, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel; target:src_ip;)