ET MALWARE Gamaredon/Armageddon Activity (Retrieving Remote .dot)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/prior/energy/bidding.dot"; fast_pattern; endswith;
http.host;
pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Gamaredon/Armageddon Activity (Retrieving Remote .dot) · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Gamaredon/Armageddon Activity (Retrieving Remote .dot)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/prior/energy/bidding.dot"; fast_pattern; endswith;
    http.host;
    pcre:"/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/";
    http.header_names;
    content:!"Referer";
    reference:url,ssu.gov.ua/uploads/files/DKIB/Technical%20report%20Armagedon.pdf;
    classtype:trojan-activity;
    sid:2034353; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2021_11_05, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_11_05;
)

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