alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET DELETED Ransomware Win32/WinPlock.A CnC Beacon 3"; flow:established,to_server; content:"POST"; http_method; urilen:1; content:!"Referer|3a|"; http_header; content:"unit_action="; depth:12; http_client_body; fast_pattern; reference:md5,b8a1012e3afc6eabb7819ce4d8e2b93b; classtype:command-and-control; sid:2021823; rev:3; metadata:attack_target Client_Endpoint, created_at 2015_09_23, deployment Perimeter, signature_severity Major, tag c2, updated_at 2019_07_26, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)