ET MALWARE Sakula/Mivast RAT CnC Beacon 7

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Sakula/Mivast RAT CnC Beacon 7";
    flow:to_server,established;
    http.method;
    content:"GET";
    http.uri;
    content:".jpg?vid="; fast_pattern;
    pcre:"/\.jpg\?vid=\d+$/";
    http.header_names;
    content:!"Accept";
    content:!"Referer|0d 0a|";
    reference:url,www.secureworks.com/cyber-threat-intelligence/threats/sakula-malware-family/;
    classtype:command-and-control;
    sid:2021570; rev:5;
    metadata:attack_target Client_Endpoint, created_at 2015_08_01, deployment Perimeter, signature_severity Major, tag c2, updated_at 2020_10_01, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)