alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED WinGO\Monitor.go CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:"/log"; bsize:4; http.user_agent; content:"workbench Windows NT"; fast_pattern; http.header; content:"Fileversion|3a 20|"; http.header_names; content:!"Referer"; http.request_body; content:"dev_id="; content:"device_mode="; content:"error="; content:"level="; content:"time="; content:"value="; reference:md5,11335bf1616a8fba16451a6f52b3f238; classtype:trojan-activity; sid:2039749; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_11_07, deployment Perimeter, former_category MALWARE, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_23, reviewed_at 2024_09_23;)