ET MALWARE Kimsuky APT Related Host Data Exfil M5

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
pcre:"/^\/\?m=[abcde]&p1=[a-f0-9-]{8,40}(?:&p2=[^&]+)?(?:&p3=[^&]+)?$/i";
http.uri.raw;
content:"//?m="; depth:5; fast_pattern;
content:"&p1="; distance:1; within:4;
http.header_names;
content:!"Referer|0d 0a|";
Raw source ET MALWARE Kimsuky APT Related Host Data Exfil M5 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE Kimsuky APT Related Host Data Exfil M5";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    pcre:"/^\/\?m=[abcde]&p1=[a-f0-9-]{8,40}(?:&p2=[^&]+)?(?:&p3=[^&]+)?$/i";
    http.uri.raw;
    content:"//?m="; depth:5; fast_pattern;
    content:"&p1="; distance:1; within:4;
    http.header_names;
    content:!"Referer|0d 0a|";
    reference:md5,0684d80e91581730f814e831f703bf5b;
    reference:url,twitter.com/s1ckb017/status/1507316584079142915;
    classtype:trojan-activity;
    sid:2035611; rev:2;
    metadata:created_at 2022_03_25, malware_family Kimsuky, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_05_03;
)

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