ET MALWARE Observed Malicious SSL Cert (SilentLibrarian)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"edou.me"; fast_pattern;
pcre:"/CN=(?:[^\r\n]+?\.)?edou\.me(?!\.)/";
Raw source ET MALWARE Observed Malicious SSL Cert (SilentLibrarian) · 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 Observed Malicious SSL Cert (SilentLibrarian)";
    flow:established,to_client;
    tls.cert_subject;
    content:"edou.me"; fast_pattern;
    pcre:"/CN=(?:[^\r\n]+?\.)?edou\.me(?!\.)/";
    reference:url,twitter.com/TeamDreier/status/1542155689631617025;
    classtype:domain-c2;
    sid:2037232; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, affected_product Web_Browsers, attack_target Client_Endpoint, created_at 2022_06_30, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_30;
)

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