ET MALWARE Gamaredon APT Related Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".mdm"; endswith; fast_pattern;
http.user_agent;
content:"|3b 20|ms-office|3b 20|";
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Gamaredon APT Related 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 Gamaredon APT Related Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".mdm"; endswith; fast_pattern;
    http.user_agent;
    content:"|3b 20|ms-office|3b 20|";
    http.header_names;
    content:!"Referer";
    reference:md5,21a2e24fc146a7baf47e90651cf397ad;
    reference:url,blogs.blackberry.com/en/2023/01/gamaredon-abuses-telegram-to-target-ukrainian-organizations;
    classtype:trojan-activity;
    sid:2044006; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_01_27, deployment Perimeter, malware_family Gamaredon, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_01_27;
    target:src_ip;
)

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