alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ET RETIRED Win32/Criminal RAT CnC Checkin"; flow:established,to_server; http.method; content:"POST"; http.uri; content:".php?code="; pcre:"/^[0-9]{3}$/R"; http.header_names; content:!"Referer"; content:!"User-Agent"; http.request_body; content:"username="; content:"ip="; content:"country="; content:"city="; content:"date="; content:"lastdate="; content:"lasttime="; content:"mwv="; fast_pattern; content:"assigned="; reference:md5,9cdbd39b541b76b3435b9150a6d97999; classtype:trojan-activity; sid:2037022; rev:2; metadata:attack_target Client_Endpoint, created_at 2022_06_16, deployment Perimeter, former_category MALWARE, malware_family Win32_Criminal, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;)