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;
)