ET HUNTING Observed Suspicious Reversed String Inbound (StrReverse)

Query · suricata

flow:established,to_client;
http.stat_code;
content:"200";
file.data;
content:"esreveRrtS"; nocase;
Raw source ET HUNTING Observed Suspicious Reversed String Inbound (StrReverse) · Suricata
Esc
Published by Emerging Threats Open ↗, licensed under BSD 3-Clause ↗. Line breaks added for readability; the rule is otherwise unchanged. 
alert http $EXTERNAL_NET any -> $HOME_NET any (
    msg:"ET HUNTING Observed Suspicious Reversed String Inbound (StrReverse)";
    flow:established,to_client;
    http.stat_code;
    content:"200";
    file.data;
    content:"esreveRrtS"; nocase;
    classtype:bad-unknown;
    sid:2036336; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2020_03_18, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2020_11_09;
)

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