ET MALWARE EMAIL SSL Cert APT1

Query · suricata

flow:established,to_client;
tls.cert_serial;
content:"2F:09:DD:E0:FF:81:B7:6C:BF:2F:17:92:0C:D8:BD:57";
tls.cert_subject;
content:"CN=EMAIL";
Raw source ET MALWARE EMAIL SSL Cert APT1 · 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 any -> $HOME_NET any (
    msg:"ET MALWARE EMAIL SSL Cert APT1";
    flow:established,to_client;
    tls.cert_serial;
    content:"2F:09:DD:E0:FF:81:B7:6C:BF:2F:17:92:0C:D8:BD:57";
    tls.cert_subject;
    content:"CN=EMAIL";
    reference:url,www.mandiant.com/apt1;
    classtype:targeted-activity;
    sid:2016464; rev:4;
    metadata:attack_target Client_Endpoint, created_at 2013_02_22, deployment Perimeter, confidence High, signature_severity Major, tag SSL_Malicious_Cert, updated_at 2022_03_18;
)

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