ET MALWARE TA421/YTTRIUM/APT29 TLS Certificate M3

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"C=US, O=GMO GlobalSign, Inc"; startswith; fast_pattern;
tls.cert_issuer;
content:"C=US, O=GMO GlobalSign, Inc, CN=*"; bsize:33;
Raw source ET MALWARE TA421/YTTRIUM/APT29 TLS Certificate M3 · 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 TA421/YTTRIUM/APT29 TLS Certificate M3";
    flow:established,to_client;
    tls.cert_subject;
    content:"C=US, O=GMO GlobalSign, Inc"; startswith; fast_pattern;
    tls.cert_issuer;
    content:"C=US, O=GMO GlobalSign, Inc, CN=*"; bsize:33;
    reference:url,community.riskiq.com/article/642d186e;
    classtype:domain-c2;
    sid:2033634; rev:2;
    metadata:attack_target Client_and_Server, created_at 2021_07_31, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2024_07_04, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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