ET MALWARE DonotGroup Maldoc Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
pcre:"/^\/[A-Za-z0-9]{16}\/[A-Za-z0-9]{48}\.ico$/";
content:"/"; startswith;
content:"/"; distance:16; within:1;
content:".ico"; distance:48; within:4; endswith; fast_pattern;
http.header_names;
content:"|0d 0a|Accept|0d 0a|Accept-Encoding|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:59;
target:src_ip;
Raw source ET MALWARE DonotGroup Maldoc 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE DonotGroup Maldoc Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\/[A-Za-z0-9]{16}\/[A-Za-z0-9]{48}\.ico$/";
    content:"/"; startswith;
    content:"/"; distance:16; within:1;
    content:".ico"; distance:48; within:4; endswith; fast_pattern;
    http.header_names;
    content:"|0d 0a|Accept|0d 0a|Accept-Encoding|0d 0a|User-Agent|0d 0a|Host|0d 0a|Connection|0d 0a 0d 0a|"; bsize:59;
    reference:md5,64266fc0f0b37a26e14133ad19b98b7c;
    reference:url,twitter.com/Timele9527/status/1597955256423309312;
    classtype:trojan-activity;
    sid:2041452; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_11_30, deployment Perimeter, malware_family DonotGroup, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_14;
    target:src_ip;
)

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