ET MALWARE CozyDuke APT Possible SSL Cert 5

Query · suricata

flow:established,to_client;
tls.cert_serial;
content:"03:5f"; depth:5;
tls.cert_subject;
content:"CN=*.corp.utilitytelephone.com"; fast_pattern;
Raw source ET MALWARE CozyDuke APT Possible SSL Cert 5 · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tls $EXTERNAL_NET 443 -> $HOME_NET any (
    msg:"ET MALWARE CozyDuke APT Possible SSL Cert 5";
    flow:established,to_client;
    tls.cert_serial;
    content:"03:5f"; depth:5;
    tls.cert_subject;
    content:"CN=*.corp.utilitytelephone.com"; fast_pattern;
    reference:url,securelist.com/blog/69731/the-cozyduke-apt/;
    reference:md5,4121414c63079b7fa836be00f8d0a93b;
    classtype:targeted-activity;
    sid:2020970; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2015_04_22, deployment Perimeter, confidence Medium, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2024_04_12;
)

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.