ET MALWARE Win32/ElectricFish Authentication Packet Observed

Query · suricata

flow:established,to_server;
content:"aaaabbbbccccdddd|00 00 00 00 00 00 00 00|"; depth:24; fast_pattern;
content:"|00 00 04 00 00 00|"; distance:2; within:6;
Raw source ET MALWARE Win32/ElectricFish Authentication Packet Observed · 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 tcp $HOME_NET any -> any any (
    msg:"ET MALWARE Win32/ElectricFish Authentication Packet Observed";
    flow:established,to_server;
    content:"aaaabbbbccccdddd|00 00 00 00 00 00 00 00|"; depth:24; fast_pattern;
    content:"|00 00 04 00 00 00|"; distance:2; within:6;
    reference:url,www.us-cert.gov/ncas/analysis-reports/AR19-129A;
    classtype:trojan-activity;
    sid:2027340; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, created_at 2019_05_09, deployment Perimeter, deployment Internal, malware_family ElectricFish, performance_impact Low, confidence Medium, signature_severity Major, tag APT, tag T1090, tag connection_proxy, updated_at 2019_07_26;
)

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