After downloading, extract SecTok.exe.

When you type sectok /?, you receive:

SecTok V01.00.00cpp Joe Richards (joe@joeware.net) November 2001                              Usage:                               SecTok                                Ex1:                                  SecTok                                    Displays token info for current process                               This software is Freeware. Use it as you wish at your own risk.                               If you have improvement ideas, bugs, or just wish to say Hi, I                               receive email 24x7 and read it in a semi-regular timeframe.                               You can usually find me at joe@joeware.net
When Joe typed SecTok, he received:
SecTok V01.00.00cpp Joe Richards (joe@joeware.net) November 2001                              User: S-1-5-21-1275210071-789336058-1957994488-1109 - JOEHOME\$jricha34                              Group: S-1-1-0 - Everyone                              Group: S-1-2-0 - LOCAL                              Group: S-1-5-11 - NT AUTHORITY\Authenticated Users                              Group: S-1-5-21-1275210071-789336058-1957994488-512 - JOEHOME\Domain Admins                              Group: S-1-5-21-1275210071-789336058-1957994488-513 - JOEHOME\Domain Users                              Group: S-1-5-21-1275210071-789336058-1957994488-518 - JOEHOME\Schema Admins                              Group: S-1-5-21-1275210071-789336058-1957994488-519 - JOEHOME\Enterprise Admins                              Group: S-1-5-21-1275210071-789336058-1957994488-520 - JOEHOME\Group Policy Creator Owners                              Group: S-1-5-32-544 - BUILTIN\Administrators                              Group: S-1-5-32-545 - BUILTIN\Users                              Group: S-1-5-4 - NT AUTHORITY\INTERACTIVE                              Group: S-1-5-5-0-38867 - Logon Session
If a process that is running in the LocalSystem context runs SecTok, the display would look like:
SecTok V01.00.00cpp Joe Richards (joe@joeware.net) November 2001                              User: S-1-5-18 - NT AUTHORITY\SYSTEM                              Group: S-1-1-0 - Everyone                              Group: S-1-5-11 - NT AUTHORITY\Authenticated Users                              Group: S-1-5-32-544 - BUILTIN\Administrators