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Even Microsoft’s own MSI-parser, MSIEXEC, can in certain situation leave a Windows system vulnerable to privilege escalation.

However, the use of MSI-packages can, if not created securely, leave systems vulnerable to various privilege escalation vulnerabilities. Restrict execution of Msiexec.exe to privileged accounts or groups that need to use it to lessen the opportunities for malicious usage.One of the many ways to install third-party applications on workstations and servers in corporate environments is to push MSI-installation packages using GPO’s. Ĭonsider disabling the AlwaysInstallElevated policy to prevent elevated execution of Windows Installer packages. ZIRCONIUM has used the msiexec.exe command-line utility to download and execute malicious MSI files. TA505 has used msiexec to download and execute malicious Windows Installer files. RemoteUtilities can use Msiexec to install a service. Rancor has used msiexec to download and execute malicious installer files over HTTP.

Ragnar Locker has been delivered as an unsigned MSI package that was executed with msiexec.exe. QakBot can use MSIExec to spawn multiple cmd.exe processes. Molerats has used msiexec.exe to execute an MSI payload. Metamorfo has used MsiExec.exe to automatically execute files. Melcoz can use MSI files with embedded VBScript for execution. Maze has delivered components for its ransomware attacks using MSI files, some of which have been executed from the command-line using msiexec. Machete has used msiexec to install the Machete malware. LoudMiner used an MSI installer to install the virtualization software.

Javali has used the MSI installer to download and execute malicious payloads.

IcedID can inject itself into a suspended msiexec.exe process to send beacons to C2 while appearing as a normal msi application. Grandoreiro can use MSI files to execute DLLs. Additionally, a PROPERTY=VALUE pair containing a 56-bit encryption key has been used to decrypt the main payload from the installer packages. ĭuqu has used msiexec to execute malicious Windows Installer packages. Ĭlop can use msiexec.exe to disable security tools on the system. MSI files as an initial way to start the infection chain. AppleJeus has been installed via MSI installer.