ET MALWARE ReverseRAT Activity (POST) M1

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.request_body;
content:"|43 21 f0 39 ff 82 2c 1c 54 06|"; startswith; fast_pattern;
http.header_names;
content:"|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|";
content:!"User-Agent";
content:!"Referer";
content:!"Accept";
Raw source ET MALWARE ReverseRAT Activity (POST) M1 · 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 ReverseRAT Activity (POST) M1";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.request_body;
    content:"|43 21 f0 39 ff 82 2c 1c 54 06|"; startswith; fast_pattern;
    http.header_names;
    content:"|0d 0a|Expect|0d 0a|Connection|0d 0a 0d 0a|";
    content:!"User-Agent";
    content:!"Referer";
    content:!"Accept";
    reference:md5,63c6febaeff62391187077b5e2f781e7;
    reference:md5,33a68137c05b0e2c2ee2ca559e038358;
    reference:url,blog.lumen.com/suspected-pakistani-actor-compromises-indian-power-company-with-new-reverserat/;
    classtype:trojan-activity;
    sid:2033174; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_06_24, deployment Perimeter, malware_family ReverseRAT, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_24;
)

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