ET MALWARE Atom Logger exfil via SMTP

Query · suricata

flow:established,to_server;
content:"Subject|3a 20|[";
content:"|20 7c 20|Atom Logger"; within:100; fast_pattern;
Raw source ET MALWARE Atom Logger exfil via SMTP · Suricata
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Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert smtp $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Atom Logger exfil via SMTP";
    flow:established,to_server;
    content:"Subject|3a 20|[";
    content:"|20 7c 20|Atom Logger"; within:100; fast_pattern;
    reference:md5,78bd897a638e7c0d3c00c31c8c68f18b;
    classtype:trojan-activity;
    sid:2026825; rev:5;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2019_01_17, deployment Perimeter, malware_family AtomLogger, performance_impact Moderate, confidence High, signature_severity Critical, updated_at 2023_05_30;
)

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