ET MALWARE CozyDuke APT HTTP GET CnC Beacon

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE CozyDuke APT HTTP GET CnC Beacon";
    flow:established,to_server;
    flowbits:set,ET.CozyDuke.HTTP;
    http.method;
    content:"GET";
    http.uri;
    content:".php?"; fast_pattern;
    pcre:"/[A-Z]{100}(?:&\w+=[a-zA-Z0-9/+=]+){0,2}$/";
    http.header_names;
    content:!"|0d 0a|Accept";
    content:!"|0d 0a|Referer|0d 0a|";
    content:"|0d 0a|User-Agent|0d 0a|"; startswith;
    reference:url,securelist.com/blog/69731/the-cozyduke-apt/;
    reference:md5,98a6484533fa12a9ba6b1bd9df1899dc;
    classtype:targeted-activity;
    sid:2020963; rev:6;
    metadata:attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, performance_impact Significant, signature_severity Major, tag c2, updated_at 2024_04_29, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)