ET INFO Observed Microsoft Attack Simulation Training SSL Cert (prizemons .com)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"prizemons.com"; fast_pattern;
pcre:"/CN=(?:[^\r\n]+?\.)?prizemons\.com(?!\.)/";
Raw source ET INFO Observed Microsoft Attack Simulation Training SSL Cert (prizemons .com) · 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 INFO Observed Microsoft Attack Simulation Training SSL Cert (prizemons .com)";
    flow:established,to_client;
    tls.cert_subject;
    content:"prizemons.com"; fast_pattern;
    pcre:"/CN=(?:[^\r\n]+?\.)?prizemons\.com(?!\.)/";
    reference:url,docs.microsoft.com/en-us/microsoft-365/security/office-365-security/attack-simulation-training-get-started;
    classtype:misc-activity;
    sid:2037202; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_06_29, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_06_29;
)

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