ET HUNTING Base64 Encoded Executable over Raw TCP

Query · suricata

flow:established,to_client;
content:"TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; nocase; fast_pattern; startswith;
target:dest_ip;
Raw source ET HUNTING Base64 Encoded Executable 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 Base64 Encoded Executable over Raw TCP";
    flow:established,to_client;
    content:"TVqQAAMAAAAEAAAA//8AALgAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"; nocase; fast_pattern; startswith;
    classtype:misc-activity;
    sid:2051681; rev:1;
    metadata:attack_target Client_and_Server, tls_state plaintext, created_at 2024_03_18, deployment Perimeter, confidence High, signature_severity Major, updated_at 2024_03_18;
    target:dest_ip;
)

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