ET MALWARE CoreDn CnC Checkin M1

Query · suricata

flow:established,to_server;
http.method;
content:"GET";
http.uri;
content:"/lib.asp?id="; fast_pattern;
pcre:"/^[a-z0-9]{3,10}$/Ri";
http.accept;
content:"*/*";
http.accept_enc;
content:"gzip, deflate";
http.header_names;
content:!"Referer";
content:!"Cache";
Raw source ET MALWARE CoreDn CnC Checkin M1 · 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 -> $EXTERNAL_NET any (
    msg:"ET MALWARE CoreDn CnC Checkin M1";
    flow:established,to_server;
    http.method;
    content:"GET";
    http.uri;
    content:"/lib.asp?id="; fast_pattern;
    pcre:"/^[a-z0-9]{3,10}$/Ri";
    http.accept;
    content:"*/*";
    http.accept_enc;
    content:"gzip, deflate";
    http.header_names;
    content:!"Referer";
    content:!"Cache";
    reference:url,blog.talosintelligence.com/2019/01/fake-korean-job-posting.html;
    classtype:command-and-control;
    sid:2026865; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_31, deployment Perimeter, malware_family CoreDn, performance_impact Low, confidence High, signature_severity Major, tag APT, updated_at 2020_08_27;
)

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.