ET MOBILE_MALWARE SSL/TLS Certificate Observed (Betcity CnC)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"CN=*.boxberry1.ru"; bsize:17; fast_pattern;
tls.cert_issuer;
content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; bsize:52;
Raw source ET MOBILE_MALWARE SSL/TLS Certificate Observed (Betcity 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 MOBILE_MALWARE SSL/TLS Certificate Observed (Betcity CnC)";
    flow:established,to_client;
    tls.cert_subject;
    content:"CN=*.boxberry1.ru"; bsize:17; fast_pattern;
    tls.cert_issuer;
    content:"C=US, O=Let's Encrypt, CN=Let's Encrypt Authority X3"; bsize:52;
    reference:url,twitter.com/ReBensk/status/1259146097978564609;
    classtype:domain-c2;
    sid:2030150; rev:1;
    metadata:affected_product Android, attack_target Mobile_Client, created_at 2020_05_11, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_05_11;
)

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