ET MALWARE Observed Malicious SSL Cert (PHPs Labyrinth Stage1 CnC)

Query · suricata

flow:established,to_client;
tls.cert_subject; bsize:17;
content:"CN=www."; startswith;
content:"rilns.com"; endswith; fast_pattern;
Raw source ET MALWARE Observed Malicious SSL Cert (PHPs Labyrinth Stage1 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 (PHPs Labyrinth Stage1 CnC)";
    flow:established,to_client;
    tls.cert_subject; bsize:17;
    content:"CN=www."; startswith;
    content:"rilns.com"; endswith; fast_pattern;
    reference:url,blog.prevailion.com/2020/02/phps-labyrinth-weaponized-wordpress.html;
    classtype:domain-c2;
    sid:2029522; rev:1;
    metadata:affected_product Wordpress_Plugins, attack_target Client_and_Server, created_at 2020_02_20, deployment Perimeter, deployment Datacenter, performance_impact Low, confidence High, signature_severity Major, tag SSL_Malicious_Cert, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2020_02_20, mitre_tactic_id TA0011, mitre_tactic_name Command_And_Control, mitre_technique_id T1071, mitre_technique_name Application_Layer_Protocol;
)

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