ET MALWARE Kimsuky APT Related Host Data Exfil M4

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
pcre:"/\/\?m=[a-z]&p1=[a-z0-9]{8,12}(?:&p2=[^&]+)?(?:&p3=[^&]+)?$/i";
content:"/?m="; fast_pattern;
content:"&p1="; distance:1; within:4;
content:!",";
http.header_names;
content:!"Content-Type";
content:!"Referer";
Raw source ET MALWARE Kimsuky APT Related Host Data Exfil M4 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Kimsuky APT Related Host Data Exfil M4";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    pcre:"/\/\?m=[a-z]&p1=[a-z0-9]{8,12}(?:&p2=[^&]+)?(?:&p3=[^&]+)?$/i";
    content:"/?m="; fast_pattern;
    content:"&p1="; distance:1; within:4;
    content:!",";
    http.header_names;
    content:!"Content-Type";
    content:!"Referer";
    reference:md5,2d1f1132ab7e80a6a8546dd2ac45bd89;
    reference:url,download.ahnlab.com/global/brochure/Analysis%20Report%20of%20Kimsuky%20Group.pdf;
    classtype:targeted-activity;
    sid:2035564; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_03_23, deployment Perimeter, malware_family Kimsuky, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_16;
)

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