ET CURRENT_EVENTS [Fireeye] Backdoor.SSL.BEACON.[CSBundle Ajax]

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"C=US, ST=WA, L=Seattle, O=Microsoft, OU=Information Technologies, CN=ajax.microsoft.com"; bsize:87; fast_pattern;
tls.cert_issuer;
content:"C=US, ST=WA, L=Seattle, O=Microsoft, OU=Information Technologies, CN=ajax.microsoft.com"; bsize:87;
Raw source ET CURRENT_EVENTS [Fireeye] Backdoor.SSL.BEACON.[CSBundle Ajax] · 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 CURRENT_EVENTS [Fireeye] Backdoor.SSL.BEACON.[CSBundle Ajax]";
    flow:established,to_client;
    tls.cert_subject;
    content:"C=US, ST=WA, L=Seattle, O=Microsoft, OU=Information Technologies, CN=ajax.microsoft.com"; bsize:87; fast_pattern;
    tls.cert_issuer;
    content:"C=US, ST=WA, L=Seattle, O=Microsoft, OU=Information Technologies, CN=ajax.microsoft.com"; bsize:87;
    reference:url,github.com/fireeye/red_team_tool_countermeasures;
    classtype:trojan-activity;
    sid:2031299; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2020_12_08, deployment Perimeter, confidence High, signature_severity Major, tag c2, updated_at 2020_12_08, mitre_tactic_id TA0010, mitre_tactic_name Exfiltration, mitre_technique_id T1041, mitre_technique_name Exfiltration_Over_C2_Channel;
)

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