alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE HTML Smuggling Powershell Payload In href"; flow:to_client,established; http.response_body; content:"|3c|a|20|href|3d 22|data|3a|text|2f|x|2d|powershell|3b|base64|2c|"; fast_pattern; reference:url,twitter.com/phage_nz/status/1552779565663387653; classtype:trojan-activity; sid:2037886; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_08_02, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_12_12, reviewed_at 2024_05_08;)