ET MALWARE NamelessC2 SSL/TLS Certificate Observed

Query · suricata

flow:established,to_client;
tls.cert_serial;
content:"C1:84:FB:D8:3E:A1:86:E2"; fast_pattern;
Raw source ET MALWARE NamelessC2 SSL/TLS Certificate Observed · 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 NamelessC2 SSL/TLS Certificate Observed";
    flow:established,to_client;
    tls.cert_serial;
    content:"C1:84:FB:D8:3E:A1:86:E2"; fast_pattern;
    reference:url,github.com/trickster0/NamelessC2/tree/d075534d4be70fed2e0d3f85c8e90ccc7ac5bc85/NamelessServer;
    classtype:domain-c2;
    sid:2056363; rev:1;
    metadata:attack_target Client_Endpoint, tls_state TLSEncrypt, created_at 2024_09_30, deployment Perimeter, malware_family NamelessC2, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_09_30;
)

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