ET MALWARE Win32/Drokbk Checkin Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/index.php?passed="; fast_pattern; startswith;
pcre:"/(?:AM|PM)$/";
http.header_names;
content:!"Referer";
content:"|0d 0a|Host|0d 0a|Connection|0d 0a|"; startswith;
Raw source ET MALWARE Win32/Drokbk Checkin Activity (GET) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32/Drokbk Checkin Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/index.php?passed="; fast_pattern; startswith;
    pcre:"/(?:AM|PM)$/";
    http.header_names;
    content:!"Referer";
    content:"|0d 0a|Host|0d 0a|Connection|0d 0a|"; startswith;
    reference:url,www.secureworks.com/blog/drokbk-malware-uses-github-as-dead-drop-resolver;
    classtype:trojan-activity;
    sid:2043014; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_12_27, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_Drokbk, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_27;
)

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