ET MALWARE Kimsuky Operation Blue Estimate CnC Activity

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:".php"; endswith;
http.request_body;
content:"|22 3b 20|filename=|22|";
content:"_log.txt|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|0010::20"; fast_pattern; distance:12; within:62;
Raw source ET MALWARE Kimsuky Operation Blue Estimate CnC Activity · 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 Kimsuky Operation Blue Estimate CnC Activity";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:".php"; endswith;
    http.request_body;
    content:"|22 3b 20|filename=|22|";
    content:"_log.txt|22 0d 0a|Content-Type|3a 20|application/octet-stream|0d 0a 0d 0a|0010::20"; fast_pattern; distance:12; within:62;
    reference:url,blog.alyac.co.kr/2645;
    classtype:command-and-control;
    sid:2029222; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2020_01_02, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Kimsuky, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_01_02;
)

Detection rules belong to the projects that publish them and remain under their own licenses. This site indexes and links to them; it claims no rights in them.