ET INFO Suspicious File Extension Inbound (.phonk)

Query · suricata

flow:established,to_client;
http.header;
content:"Content|2d|Disposition|3a 20|attachment|3b 20|filename|3d|";
content:".phonk|0d 0a|"; distance:0; fast_pattern;
threshold:type limit, seconds 120, count 1, track by_src;
Raw source ET INFO Suspicious File Extension Inbound (.phonk) · 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 INFO Suspicious File Extension Inbound (.phonk)";
    flow:established,to_client;
    http.header;
    content:"Content|2d|Disposition|3a 20|attachment|3b 20|filename|3d|";
    content:".phonk|0d 0a|"; distance:0; fast_pattern;
    threshold:type limit, seconds 120, count 1, track by_src;
    reference:md5,cc101b016deadd7d54994e282e89a2ec;
    reference:url,tria.ge/221206-2fvxqadb5v/behavioral1;
    classtype:misc-activity;
    sid:2042944; rev:1;
    metadata:attack_target Client_Endpoint, created_at 2022_12_14, deployment Perimeter, deployment SSLDecrypt, confidence High, signature_severity Informational, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2022_12_14, reviewed_at 2025_10_24;
)

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