ET MALWARE SSL/TLS Certificate Observed (Buer Loader)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"CN=prioritywireless.club"; fast_pattern;
tls.cert_issuer;
content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3";
Raw source ET MALWARE SSL/TLS Certificate Observed (Buer Loader) · 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 SSL/TLS Certificate Observed (Buer Loader)";
    flow:established,to_client;
    tls.cert_subject;
    content:"CN=prioritywireless.club"; fast_pattern;
    tls.cert_issuer;
    content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3";
    classtype:command-and-control;
    sid:2029080; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_11_19, deployment Perimeter, malware_family BuerLoader, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_10_21;
)

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