ET MALWARE MalDoc/Gamaredon CnC Activity M3

Query · suricata

flow:established,to_server;
http.method;
content:"HEAD";
http.uri;
content:"/DESKTOP-"; startswith; fast_pattern;
http.user_agent;
content:"Microsoft Office Existence Discovery"; bsize:36;
Raw source ET MALWARE MalDoc/Gamaredon CnC Activity M3 · 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 MalDoc/Gamaredon CnC Activity M3";
    flow:established,to_server;
    http.method;
    content:"HEAD";
    http.uri;
    content:"/DESKTOP-"; startswith; fast_pattern;
    http.user_agent;
    content:"Microsoft Office Existence Discovery"; bsize:36;
    reference:md5,a0f20cd73ab21c559431425a99543a1c;
    reference:url,twitter.com/Cyber0verload/status/1641096737694547970;
    classtype:trojan-activity;
    sid:2044829; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_29, deployment Perimeter, confidence High, signature_severity Major, tag Gamaredon, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_29;
)

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