alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE JS/FatturaPDF CnC Checkin (GET)"; flow:established,to_server; http.method; content:"GET"; http.uri; content:"|2e|php|3f|s|3d|"; pcre:"/^(?:[a-z0-9]{8}\x2d)(?:[a-z0-9]{4}\x2d)(?:[a-z0-9]{4}\x2d)(?:[a-z0-9]{4}\x2d)(?:[a-z0-9]{12})$/R"; http.user_agent; content:"WindowsPowerShell"; fast_pattern; reference:md5,a69f4744a2247f2b0a61f488407d36c1; classtype:trojan-activity; sid:2065044; 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_10_03, deployment Perimeter, confidence Medium, signature_severity Major, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_03, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)