alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET MALWARE SysJoker Host Details Exfil (POST)"; flow:established,to_server; urilen:11; http.method; content:"POST"; http.uri; content:"/api/attach"; http.content_type; bsize:33; content:"application/x-www-form-urlencoded"; http.request_body; content:"ip="; content:"&serial="; content:"&name="; content:"&os="; content:"&user_token="; fast_pattern; reference:url,research.checkpoint.com/2023/israel-hamas-war-spotlight-shaking-the-rust-off-sysjoker; reference:url,intezer.com/blog/research/wildcard-evolution-of-sysjoker-cyber-threat; classtype:trojan-activity; sid:2049299; rev:2; metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_11_27, deployment Perimeter, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_03_27;)