ET MALWARE Win32.Application.ThunderN.A Checkin

Query · suricata

flow:established,to_server;
stream_size:server,<,5;
content:"|1b 00 0c|"; startswith;
content:"Startup102_embedding|ea 03 01 00 00 00|"; endswith; fast_pattern;
Raw source ET MALWARE Win32.Application.ThunderN.A Checkin · 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-pkt $HOME_NET any -> $EXTERNAL_NET any (
    msg:"ET MALWARE Win32.Application.ThunderN.A Checkin";
    flow:established,to_server;
    stream_size:server,<,5;
    content:"|1b 00 0c|"; startswith;
    content:"Startup102_embedding|ea 03 01 00 00 00|"; endswith; fast_pattern;
    reference:md5,1f1ef30f55a9b69bf0b8706e479beca0;
    classtype:command-and-control;
    sid:2034275; rev:2;
    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, created_at 2021_10_28, deployment Perimeter, performance_impact Low, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_28;
)

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