Rule History

alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE Observed Spoofed WindowsPowerShell User-Agent"; flow:established,to_server; http.user_agent; bsize:10; content:"PowerShell"; classtype:trojan-activity; sid:2064010; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2025_08_14, deployment Perimeter, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_08_14, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol; target:src_ip;)