ET RETIRED HTTPRevShell Initial CnC Checkin

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET RETIRED HTTPRevShell Initial CnC Checkin";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\/[a-zA-Z0-9]{32}$/U";
    http.header_names;
    content:!"User-Agent";
    content:!"Referer";
    http.request_body;
    content:"username=";
    content:"computername=";
    content:"processname="; fast_pattern;
    content:"processid=";
    content:"arch=";
    content:"cwd=";
    content:"internalip=";
    reference:md5,b77f17c914ba3af3bce2d98beb6cc4c6;
    classtype:trojan-activity;
    sid:2038611; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2022_08_24, deployment Perimeter, former_category MALWARE, malware_family HTTPRevShell, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_17, reviewed_at 2024_09_17;
)