ET MALWARE AlphaCrypt CnC Beacon 5

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE AlphaCrypt CnC Beacon 5";
    flow:established,to_server;
    urilen:>250;
    http.method;
    content:"GET";
    http.uri;
    content:"/misc.php?"; fast_pattern;
    pcre:"/^[A-F0-9]{250,}$/R";
    http.header_names;
    content:!"|0d 0a|Accept";
    content:!"|0d 0a|Referer|0d 0a|";
    content:"|0d 0a|User-Agent|0d 0a|"; startswith;
    reference:md5,66bbfc1e5b027eb48c76078129194015;
    classtype:command-and-control;
    sid:2022284; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_12_18, deployment Perimeter, signature_severity Major, tag c2, updated_at 2024_03_11, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)