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msiexec.exe

msiexec.exe is the Windows Installer engine. Frequently used in admin and attacker workflows to install or repair packages. Supports quiet installs, transforms, and logging. Useful for command-exec demos with benign MSIs.

windows cli CLI

Quiet install from URL (demo)

Try Example
CLI

Demonstrates command execution via msiexec /i against a trusted URL or local MSI. Use harmless packages in testing.

  1. Press Win-R

  2. Type: msiexec /i C:\Windows\System32\shell.mui /qn /L*v %TEMP%\msi.log

  3. Press Enter

References:

Mitigations:

  • Restrict MSI installs; monitor msiexec network access and odd sources

Contributor: ClickGrab (2025-09-16)