ET HUNTING Obfuscated PowerShell Script Download - Excessive CHAR


Query · suricata

flow:established,to_client;
http.response_body;
content:"|24|"; startswith;
content:"|27 2b 27|"; distance:0; fast_pattern;
content:"|27 2b 27|"; distance:0;
target:dest_ip;
Raw source ET HUNTING Obfuscated PowerShell Script Download - Excessive CHAR · Suricata
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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 Obfuscated PowerShell Script Download - Excessive CHAR";
#    flow:established,to_client;
#    http.response_body;
#    content:"|24|"; startswith;
#    content:"|27 2b 27|"; distance:0; fast_pattern;
#    content:"|27 2b 27|"; distance:0;
#    reference:url,recordedfuture.com/research/uncovering-mintsloader-with-recorded-future-malware-intelligence-hunting;
#    reference:url,community.emergingthreats.net/t/sigs-et-hunting-possible-obfuscated-powershell-script-download/2739;
#    classtype:misc-activity;
#    sid:2062456; rev:1;
#    metadata:affected_product Windows_XP_Vista_7_8_10_Server_32_64_Bit, attack_target Client_Endpoint, tls_state plaintext, created_at 2025_05_19, deployment Perimeter, confidence Medium, signature_severity Informational, updated_at 2025_05_19, mitre_tactic_id TA0002, mitre_tactic_name Execution, mitre_technique_id T1059, mitre_technique_name Command_And_Scripting_Interpreter;
#    target:dest_ip;
#)

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