alert http $EXTERNAL_NET any -> $HOME_NET any (msg:"ET MALWARE Win32/RisePro CnC Server Response M4"; flow:established,to_client; http.stat_code; content:"200"; http.content_type; content:"text/html|3b 20|charset|3d|UTF-8"; http.header; content:"Transfer-Encoding|3a 20|chunked"; http.response_body; content:"|7b 22|success|22 3a|true|2c 22|result|22 3a 7b|"; startswith; bsize:<41; fast_pattern; content:"|7d 7d|"; endswith; reference:url,blog.sekoia.io/new-risepro-stealer-distributed-by-the-prominent-privateloader; classtype:command-and-control; sid:2043091; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_12_28, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_RisePro, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_09_01, reviewed_at 2025_10_24;)