Hi All,
Really hoping for some help here if someone has come across this before.
We have a DC on Server 2016 with a Group Policy for RDS Lockdown. This policy has AppLocker enabled.
We have an RDS Server on 2008 (limited to this OS by an app they're trying to migrate away from, but is being blocked).
Basically, we have C:\AppName\AppFolder\App.exe as an executable, and within AppLocker we've Allowed this to run for Everyone.
When logging into the terminal server and checking Policies, this policy and this setting has applied, but when trying to run the application I'm still getting "This has been blocked by Group Policy". Then checking Event Viewer under AppLocker\EXE
and DLL shows "%OSDRIVE%\AppName\AppFolder\App.exe has been prevented from running".
I've tried adding all sorts to the Allow list, I've tried both levels of folders above, I've tried the UNC to the folder via \\Servername\C$, the UNC to the Redirected Desktop (but fails when browsing via C:\ too) and even added this %OSDRIVE% path taken
directly from EventViewer, but still no luck.
I can get it to work if i add the account to Local Admin, but I'm not doing that for the user group.
I have raised this with MS but I seem to be going back over the same things I've already done and it's taking longer than I'd like, the system is meant to be Live already so there's pressure from the client. I'm also half expecting them to come back
with "This is 2008 which is no longer in support" which, to be fair, they haven't yet, but the AppLocker GPO is on a 2016 DC.
I thought it would be worth reaching out and trying multiple attack vectors, so if any of you have any ideas it would be hugely appreciated.
Thanks!
Bob