ET HUNTING Possible Obfuscator io JavaScript Obfuscation

Query · suricata

flow:established,to_client;
flowbits:isnotset,ET.obfuscator_io_exclusion;
http.response_body;
content:"|3d 27|abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789|2b 2f 3d 27 3b|var|20|"; fast_pattern;
pcre:"/function(\s_0x[0-9a-f]{4})?\(_0x[0-9a-f]{6},_0x[0-9a-f]{6}\){var _0x[0-9a-f]{6}=/Qi";

Rule dependencies

Excludes

  • ET.obfuscator_io_exclusion — excluded, not a dependency
Raw source ET HUNTING Possible Obfuscator io JavaScript Obfuscation · 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 Possible Obfuscator io JavaScript Obfuscation";
    flow:established,to_client;
    flowbits:isnotset,ET.obfuscator_io_exclusion;
    http.response_body;
    content:"|3d 27|abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789|2b 2f 3d 27 3b|var|20|"; fast_pattern;
    pcre:"/function(\s_0x[0-9a-f]{4})?\(_0x[0-9a-f]{6},_0x[0-9a-f]{6}\){var _0x[0-9a-f]{6}=/Qi";
    reference:url,obfuscator.io;
    classtype:trojan-activity;
    sid:2038501; rev:2;
    metadata:attack_target Client_Endpoint, created_at 2022_08_11, deployment Perimeter, confidence Low, signature_severity Minor, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2023_04_06, reviewed_at 2023_08_31;
)

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