ET MALWARE Win32/DarkWatchman Activity (POST)

Query · suricata

flow:established,to_server;
http.request_line;
content:"POST /index.php HTTP/1.1"; fast_pattern;
http.header;
content:"|0d 0a|X-Client-Id|3a 20|";
pcre:"/^[a-z0-9]{8}\r\n/R";
http.header_names;
content:!"Referer";
http.user_agent;
content:"Mozilla/5.0(Windows NT|20|"; startswith;
threshold:type limit, count 1, seconds 60, track by_src;
Raw source ET MALWARE Win32/DarkWatchman Activity (POST) · 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/DarkWatchman Activity (POST)";
    flow:established,to_server;
    http.request_line;
    content:"POST /index.php HTTP/1.1"; fast_pattern;
    http.header;
    content:"|0d 0a|X-Client-Id|3a 20|";
    pcre:"/^[a-z0-9]{8}\r\n/R";
    http.header_names;
    content:!"Referer";
    http.user_agent;
    content:"Mozilla/5.0(Windows NT|20|"; startswith;
    threshold:type limit, count 1, seconds 60, track by_src;
    reference:md5,2ccc9637823753de9cdcdf76a1d22725;
    classtype:trojan-activity;
    sid:2035186; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2022_02_14, deployment Perimeter, deployment SSLDecrypt, malware_family Win32_DarkWatchman, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_05_15, reviewed_at 2023_09_12;
)

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