ET MALWARE Win32/Pterodo CnC Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".html"; endswith;
http.user_agent;
content:"|3a 3a|";
content:"_"; distance:0;
content:"|3a 3a|/."; distance:0; fast_pattern;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Win32/Pterodo CnC Activity (GET) · Suricata
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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 Win32/Pterodo CnC Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".html"; endswith;
    http.user_agent;
    content:"|3a 3a|";
    content:"_"; distance:0;
    content:"|3a 3a|/."; distance:0; fast_pattern;
    http.header_names;
    content:!"Referer";
    reference:md5,dddd77f42bfb365f36762ad4db4a741e;
    reference:md5,f4e7c05fde022ec76f8c2f0a4cf2e1b3;
    reference:url,twitter.com/h2jazi/status/1498017819539116033;
    classtype:trojan-activity;
    sid:2035309; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_02_28, deployment Perimeter, malware_family Gamaredon, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_28;
)

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