ET MALWARE Clickfix Style Post-Infection CnC Request (GET)

Query · suricata

flow:established,to_server;
urilen:<9;
http.method;
content:"GET";
http.uri;
pcre:"/^\x2f[0-9]{2,3}\x2ephp$/";
http.user_agent;
content:"WindowsPowerShell/"; fast_pattern;
http.header_names;
content:!"|0d 0a|referer|0d 0a|"; nocase;
content:!"|0d 0a|accept|0d 0a|"; nocase;
http.connection; bsize:10;
content:"Keep-Alive";
Raw source ET MALWARE Clickfix Style Post-Infection CnC Request (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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Clickfix Style Post-Infection CnC Request (GET)";
    flow:established,to_server;
    urilen:<9;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/^\x2f[0-9]{2,3}\x2ephp$/";
    http.user_agent;
    content:"WindowsPowerShell/"; fast_pattern;
    http.header_names;
    content:!"|0d 0a|referer|0d 0a|"; nocase;
    content:!"|0d 0a|accept|0d 0a|"; nocase;
    http.connection; bsize:10;
    content:"Keep-Alive";
    reference:md5,b82c0588e9ccc200f75789c10e54485c;
    reference:url,app.any.run/tasks/cc4fcfe7-7855-4ce9-82cb-f077bdd34af6;
    classtype:command-and-control;
    sid:2057788; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Windows_11, attack_target Client_Endpoint, tls_state plaintext, created_at 2024_11_22, deployment Perimeter, malware_family ClickFix, confidence Medium, signature_severity Critical, updated_at 2024_11_22;
)

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