ET MALWARE Kimsuky KGH Backdoor Secondary Payload Download Request

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"?act=news&id="; fast_pattern;
http.user_agent;
content:"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0."; startswith;
Raw source ET MALWARE Kimsuky KGH Backdoor Secondary Payload Download Request · 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 Kimsuky KGH Backdoor Secondary Payload Download Request";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"?act=news&id="; fast_pattern;
    http.user_agent;
    content:"Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0."; startswith;
    reference:url,www.cybereason.com/blog/back-to-the-future-inside-the-kimsuky-kgh-spyware-suite;
    classtype:targeted-activity;
    sid:2031170; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_11_03, deployment Perimeter, malware_family KGH_Malware_Suite, confidence High, signature_severity Major, tag Kimsuky, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_11_03;
)

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