ET MALWARE Observed Malicious SSL Cert (CONFUCIOUS_B CnC)

Query · suricata

flow:established,to_client;
tls.cert_serial;
content:"00:f9:1c:f7:fd:a7:bc:0a:9a"; bsize:26; fast_pattern;
tls.cert_subject;
content:"Internet Widgets";
Raw source ET MALWARE Observed Malicious SSL Cert (CONFUCIOUS_B CnC) · 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 (CONFUCIOUS_B CnC)";
    flow:established,to_client;
    tls.cert_serial;
    content:"00:f9:1c:f7:fd:a7:bc:0a:9a"; bsize:26; fast_pattern;
    tls.cert_subject;
    content:"Internet Widgets";
    reference:md5,2d2fe787b2728332341166938a25fa26;
    reference:url,unit42.paloaltonetworks.com/unit42-confucius-says-malware-families-get-further-by-abusing-legitimate-websites;
    classtype:domain-c2;
    sid:2029926; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_and_Server, created_at 2020_04_16, deployment Perimeter, malware_family CONFUCIUS_B, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_04_16, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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