ET MALWARE Donot Group Related Activity (Response)

Query · suricata

flow:established,to_client;
flowbits:isset,ET.donotgroup;
file.data;
content:".dll|3e|"; depth:20; fast_pattern;
content:"|7c|"; distance:0; within:25;
target:dest_ip;

Rule dependencies

⚠ Higher-order rule. It fires on other rules' alerts, not on raw events, so it cannot fire on its own. Deploy the rules it depends on too.

Depends on

Raw source ET MALWARE Donot Group Related Activity (Response) · 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 $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE Donot Group Related Activity (Response)";
    flow:established,to_client;
    flowbits:isset,ET.donotgroup;
    file.data;
    content:".dll|3e|"; depth:20; fast_pattern;
    content:"|7c|"; distance:0; within:25;
    reference:url,ti.qianxin.com/blog/articles/Heavy-Shadows:-Summary-of-Recent-Attack-Techniques-Used-by-Donot-Group-EN/;
    reference:md5,d7e123fe7fb8a5f56ec9d89f7787340d;
    classtype:trojan-activity;
    sid:2047033; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_08_03, deployment Perimeter, deployment SSLDecrypt, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_08_03, reviewed_at 2024_05_07;
    target:dest_ip;
)

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