ET MALWARE GlassWorm Decryption IV/Key Response

Query · suricata

flow:established,to_client;
http.header;
content:"ivbase64|3a 20|"; fast_pattern; nocase;
content:"secretkey|3a 20|"; nocase;
Raw source ET MALWARE GlassWorm Decryption IV/Key Response · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET MALWARE GlassWorm Decryption IV/Key Response";
    flow:established,to_client;
    http.header;
    content:"ivbase64|3a 20|"; fast_pattern; nocase;
    content:"secretkey|3a 20|"; nocase;
    reference:url,www.koi.ai/blog/glassworm-first-self-propagating-worm-using-invisible-code-hits-openvsx-marketplace;
    classtype:trojan-activity;
    sid:2065256; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2025_10_20, deployment Perimeter, confidence High, signature_severity Major, tag c2, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2025_10_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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