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Update Msiexec.exe with Unicode /package switch obfuscation - #533

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Liran017:msiexec-unicode-switch-obfuscation
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Liran017:msiexec-unicode-switch-obfuscation

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Adds an observed msiexec command for silently installing a remote MSI with an obfuscated /package switch. The substituted characters are ᵃ (U+1D43), ᶜ (U+1D9C), and ᵍ (U+1D4D). NFKC normalization collapses /PᵃᶜkAᵍe to /package, so Windows runs the command as intended while detections matching the exact ASCII /package token do not fire.

The existing entry covers silent remote installation through /i. This update adds the /package alias and the Unicode modifier-letter obfuscation.

ThreatHunter.ai documented the command in an Azure30 ClickFix intrusion that retrieved the MSI from usaclodconfig[.]net: https://www.threathunter.ai/blog/azure30-nodejs-backdoor-trojanized-msi-clickfix

@Liran017
Liran017 requested a review from a team as a code owner October 11, 2026 08:50
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