ET MALWARE Cobalt Strike Activity (GET)

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:".html?provider="; fast_pattern;
http.cookie;
content:"wordpress_"; startswith;
http.user_agent;
content:"Windows|20|NT|20|7.1|3b 20|";
http.header_names;
content:!"Referer";
Raw source ET MALWARE Cobalt Strike 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 Cobalt Strike Activity (GET)";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:".html?provider="; fast_pattern;
    http.cookie;
    content:"wordpress_"; startswith;
    http.user_agent;
    content:"Windows|20|NT|20|7.1|3b 20|";
    http.header_names;
    content:!"Referer";
    reference:md5,b4c716f08907cd4e848bb9ab541dc449;
    classtype:trojan-activity;
    sid:2035130; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_02_08, deployment Perimeter, deployment SSLDecrypt, malware_family Cobalt_Strike, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_02_08, reviewed_at 2023_08_25;
)

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