ET MALWARE Snake Keylogger Exfil via SMTP

Query · suricata

flow:established,to_server;
content:"Subject|3a 20|";
content:"|20 7c 20|Snake Tracker|0d 0a|"; within:200; fast_pattern;
target:src_ip;
Raw source ET MALWARE Snake Keylogger Exfil via SMTP · Suricata
Esc
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 Snake Keylogger Exfil via SMTP";
    flow:established,to_server;
    content:"Subject|3a 20|";
    content:"|20 7c 20|Snake Tracker|0d 0a|"; within:200; fast_pattern;
    reference:md5,b8eb18c7a33fec016ff3c1777f3819c2;
    classtype:trojan-activity;
    sid:2044767; rev:1;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2023_03_27, deployment Perimeter, malware_family Snake_Keylogger, performance_impact Low, confidence High, signature_severity Critical, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_03_27;
    target:src_ip;
)

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