ET HUNTING PE EXE Download over raw TCP

Query · suricata

flow:established,to_client;
stream_size:client,<,5;
dsize:>11;
content:"MZ"; startswith;
byte_jump:4,58,relative,little;
content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
Raw source ET HUNTING PE EXE Download over raw TCP · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert tcp $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING PE EXE Download over raw TCP";
    flow:established,to_client;
    stream_size:client,<,5;
    dsize:>11;
    content:"MZ"; startswith;
    byte_jump:4,58,relative,little;
    content:"PE|00 00|"; fast_pattern; distance:-64; within:4;
    reference:url,github.com/corkami/docs/blob/master/PE/PE.md;
    classtype:misc-activity;
    sid:2035480; rev:3;
    metadata:attack_target Client_Endpoint, created_at 2022_03_16, deployment Perimeter, performance_impact Moderate, confidence Medium, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_03_17;
)

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