alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET ATTACK_RESPONSE Unknown Payload Downloader Inbound"; flow:established,to_client; http.response_body; content:"echo|20|Opening|20|PDF|20|file|3a 20|"; content:"set|20 22|msvpUrl|3d|http"; distance:0; fast_pattern; content:"Invoke|2d|WebRequest|20 2d|Uri|20 27 25|msvpUrl|25 27|"; distance:0; reference:md5,3ec402cf37b62c46d70e993af8390d04; reference:md5,ca55900248726f166dd50a26d2221f99; reference:url,cyber.wtf/2025/02/12/unpacking-pyarmor-v8-scripts; classtype:trojan-activity; sid:2061149; rev:1; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state TLSDecrypt, created_at 2025_03_27, deployment Perimeter, deployment SSLDecrypt, confidence Medium, signature_severity Major, updated_at 2025_03_27, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1105, mitre_technique_name Ingress_Tool_Transfer; target:dest_ip;)