ET MALWARE Observed Malicious SSL Cert (Go/Chaos Botnet)

Query · suricata

flow:established,to_client;
tls.cert_subject;
content:"C=US, ST=Chaos, O=Chaos, OU=Chaos, CN=127.0.0.1"; bsize:47; fast_pattern;
tls.cert_issuer;
content:"C=US, ST=Chaos, O=Chaos, OU=Chaos, CN=127.0.0.1"; bsize:47;
Raw source ET MALWARE Observed Malicious SSL Cert (Go/Chaos Botnet) · 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 (Go/Chaos Botnet)";
    flow:established,to_client;
    tls.cert_subject;
    content:"C=US, ST=Chaos, O=Chaos, OU=Chaos, CN=127.0.0.1"; bsize:47; fast_pattern;
    tls.cert_issuer;
    content:"C=US, ST=Chaos, O=Chaos, OU=Chaos, CN=127.0.0.1"; bsize:47;
    reference:url,blog.lumen.com/chaos-is-a-go-based-swiss-army-knife-of-malware/;
    classtype:command-and-control;
    sid:2039038; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2022_09_29, deployment Perimeter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_09_29;
)

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