ET POLICY Possible Windows Binary Observed in SSL/TLS Certificate

Query · suricata

flow:established,from_server;
tls.certs;
content:"This program cannot be run in DOS mode"; nocase; bsize:>768;
Raw source ET POLICY Possible Windows Binary Observed in SSL/TLS Certificate · Suricata
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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 POLICY Possible Windows Binary Observed in SSL/TLS Certificate";
    flow:established,from_server;
    tls.certs;
    content:"This program cannot be run in DOS mode"; nocase; bsize:>768;
    reference:url,www.fidelissecurity.com/threatgeek/2018/02/exposing-x509-vulnerabilities;
    classtype:misc-attack;
    sid:2025315; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2018_02_06, deployment Perimeter, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_28;
)

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