ET MALWARE W32/Ke3chang.BMW.APT Campaign CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE W32/Ke3chang.BMW.APT Campaign CnC Beacon";
    flow:established,to_server;
    urilen:35<>37;
    http.method;
    content:"POST";
    http.uri;
    content:".aspx?Random="; fast_pattern;
    pcre:"/^\x2F(?:acheb|bajree|cyacrin|dauber|eaves)\x2Easpx\x3FRandom\x3D[a-z]{16}$/i";
    reference:url,www.fireeye.com/resources/pdfs/fireeye-operation-ke3chang.pdf;
    reference:url,www.fireeye.com/blog/technical/malware-research/2013/12/operation-ke3chang-targeted-attacks-against-ministries-of-foreign-affairs.html;
    classtype:targeted-activity;
    sid:2017858; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2013_12_13, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_09_22, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)