ET HUNTING Observed Suspicious SSL Cert (External IP Lookup - ident .me)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"CN=any.ident.me"; nocase; endswith;
Raw source ET HUNTING Observed Suspicious SSL Cert (External IP Lookup - ident .me) · 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 HUNTING Observed Suspicious SSL Cert (External IP Lookup - ident .me)";
    flow:established,to_client;
    tls.cert_subject;
    content:"CN=any.ident.me"; nocase; endswith;
    classtype:external-ip-check;
    sid:2026743; rev:5;
    metadata:affected_product Any, attack_target Client_Endpoint, created_at 2018_12_26, deployment Perimeter, performance_impact Low, confidence High, signature_severity Informational, updated_at 2022_10_25, reviewed_at 2024_04_22, mitre_tactic_id TA0007, mitre_tactic_name Discovery, mitre_technique_id T1614, mitre_technique_name System_Location_Discovery;
)

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