alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE RustyStealer CnC Checkin (POST)"; flow:established,to_server; http.method; content:"POST"; http.request_body; content:"form|2d|data|3b 20|name|3d 22|hwid|22 0d 0a|"; content:"form|2d|data|3b 20|name|3d 22|build|22 0d 0a|"; distance:0; fast_pattern; content:"form|2d|data|3b 20|name|3d 22|message|22 0d 0a|"; distance:0; reference:md5,fc840a1068f54dbb45e50fe444f70cda; reference:url,x.com/Jane_0sint/status/1902817576117297326; classtype:command-and-control; sid:2061006; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_03_21, deployment Perimeter, malware_family RustyStealer, confidence High, signature_severity Critical, tag c2, updated_at 2025_03_21, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)