ET MALWARE Kimsuky Related Activity (down)

Query · suricata

flow:established,to_server;
http.method;
content:"POST";
http.uri;
content:"/"; bsize:1;
http.request_body;
content:"i=down"; startswith; fast_pattern;
content:"&u="; distance:0;
content:"&p="; distance:0;
content:"&v="; distance:0;
http.header_names;
content:!"Referer";
Raw source ET MALWARE Kimsuky Related Activity (down) · 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 Related Activity (down)";
    flow:established,to_server;
    http.method;
    content:"POST";
    http.uri;
    content:"/"; bsize:1;
    http.request_body;
    content:"i=down"; startswith; fast_pattern;
    content:"&u="; distance:0;
    content:"&p="; distance:0;
    content:"&v="; distance:0;
    http.header_names;
    content:!"Referer";
    reference:md5,447163d776b62bf0b1c652c996cc0586;
    reference:md5,7e041b101e1e574fb81f3f0cdf1c72b8;
    reference:url,twitter.com/Timele9527/status/1407610627011403779;
    classtype:trojan-activity;
    sid:2033194; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2021_06_25, deployment Perimeter, malware_family Kimsuky, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_06_25;
)

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