ET ATTACK_RESPONSE Obfuscated Batch Script Inbound M1

Query · suricata

flow:established,from_server;
content:"|2c 31 25 25 27 3a 7e|";
content:"|2c 31 25 25 27 3a 7e|"; distance:0;
pcre:"/[-\d]{1,4}(?:\x2c\x31\x25\x25\x27\x3a\x7e[-\d]{1,4}){10}/R";
Raw source ET ATTACK_RESPONSE Obfuscated Batch Script Inbound M1 · 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 ATTACK_RESPONSE Obfuscated Batch Script Inbound M1";
    flow:established,from_server;
    content:"|2c 31 25 25 27 3a 7e|";
    content:"|2c 31 25 25 27 3a 7e|"; distance:0;
    pcre:"/[-\d]{1,4}(?:\x2c\x31\x25\x25\x27\x3a\x7e[-\d]{1,4}){10}/R";
    reference:md5,abd0a49fda67547639eeaced7955a01a;
    classtype:misc-attack;
    sid:2034183; rev:1;
    metadata:created_at 2021_10_13, confidence Medium, signature_severity Major, tag Description_Generated_By_Proofpoint_Nexus, updated_at 2021_10_13, mitre_tactic_id TA0005, mitre_tactic_name Defense_Evasion, mitre_technique_id T1027, mitre_technique_name Obfuscated_Files_or_Information;
)

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