ET MALWARE Possible Charming Kitten Backdoor CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.user_agent; bsize:19;
content:"WinHTTP Example/1.0";
http.request_body;
content:"server_module_name="; fast_pattern;
content:"&server_task";
content:"&systemtype=";
Raw source ET MALWARE Possible Charming Kitten Backdoor CnC Activity · 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 Possible Charming Kitten Backdoor CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.user_agent; bsize:19;
    content:"WinHTTP Example/1.0";
    http.request_body;
    content:"server_module_name="; fast_pattern;
    content:"&server_task";
    content:"&systemtype=";
    reference:md5,3d67ce57aab4f7f917cf87c724ed7dab;
    reference:url,blog.certfa.com/posts/fake-interview-the-new-activity-of-charming-kitten/;
    classtype:targeted-activity;
    sid:2029495; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_02_19, deployment Perimeter, confidence Medium, signature_severity Major, updated_at 2020_02_19;
)

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