ET MALWARE Gamaredon APT Related Activity (GET)

Query · suricata

flow:established,to_server;
urilen:>20;
http.method;
content:"GET";
http.uri;
content:".rcs"; 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;
    urilen:>20;
    http.method;
    content:"GET";
    http.uri;
    content:".rcs"; endswith; fast_pattern;
    http.user_agent;
    content:"|3b 20|ms-office|3b 20|";
    http.header_names;
    content:!"Referer";
    reference:md5,99027f9e62dfd72ac41d47fd3ab151bd;
    reference:url,twitter.com/500mk500/status/1634158936608710663;
    classtype:trojan-activity;
    sid:2044556; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2023_03_10, deployment Perimeter, malware_family Gamaredon, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_10;
    target:src_ip;
)

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