alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Matanbuchus Loader CnC M3"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php"; endswith; http.content_type; content:"application/x-www-form-urlencoded"; bsize:33; http.request_body; content:!"&"; content:"=ey"; depth:13; fast_pattern; pcre:"/^[IJKL].*(?:PT0iLC|09Iiwi|9PSIsI)[a-zA-Z0-9+\/]+(?:PT0iLC|09Iiwi|9PSIsI)/R"; http.header_names; content:!"Referer"; threshold:type limit, track by_src, count 1, seconds 120; reference:url,twitter.com/fr0s7_/status/1458823504925798408; classtype:command-and-control; sid:2034468; rev:3; metadata:attack_target Client_Endpoint, created_at 2021_11_16, deployment Perimeter, confidence High, signature_severity Major, updated_at 2021_11_18, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;)