ET MALWARE Donot Group Downloader Activity (GET)

Query · suricata

flow:established,to_server;
urilen:>20;
http.method;
content:"GET";
http.header_names;
content:"|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:30;
http.accept;
content:"|5c 5c 15 54 12|"; fast_pattern; endswith;
target:src_ip;
Raw source ET MALWARE Donot Group Downloader Activity (GET) · Suricata
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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 Donot Group Downloader Activity (GET)";
    flow:established,to_server;
    urilen:>20;
    http.method;
    content:"GET";
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|User-Agent|0d 0a|Host|0d 0a 0d 0a|"; bsize:30;
    http.accept;
    content:"|5c 5c 15 54 12|"; fast_pattern; endswith;
    reference:md5,8f2829a963c3b6f247ac77e0bf992bf1;
    classtype:trojan-activity;
    sid:2044208; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_15, deployment Perimeter, deployment SSLDecrypt, malware_family DonotGroup, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_15;
    target:src_ip;
)

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