ET MALWARE Suspected Gamaredon Related Activity (GET)

Query · suricata

flow:established,to_server;
urilen:>30;
http.method;
content:"GET";
http.uri;
content:"/USER-"; fast_pattern;
http.user_agent;
content:"|3b 20|ms-office|3b 20|";
http.header_names;
content:!"Referer";
target:src_ip;
Raw source ET MALWARE Suspected Gamaredon 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 Suspected Gamaredon Related Activity (GET)";
    flow:established,to_server;
    urilen:>30;
    http.method;
    content:"GET";
    http.uri;
    content:"/USER-"; fast_pattern;
    http.user_agent;
    content:"|3b 20|ms-office|3b 20|";
    http.header_names;
    content:!"Referer";
    reference:md5,7866fd386ebcadd51966f3ed2092c101;
    reference:url,twitter.com/StopMalvertisin/status/1624040846785134592;
    classtype:trojan-activity;
    sid:2044166; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_02_10, deployment Perimeter, malware_family Gamaredon, performance_impact Moderate, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_02_10;
    target:src_ip;
)

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