Execution fails if FIPS algorithms are enforced

[leechristensen]

Describe the bug
When "Use FIPS compliant algorithms for encryption, hashing, and signing" is enabled on the system (you can check this with the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Lsa\FipsAlgorithmPolicy, and if Enabled = 1), Seatbelt throws the following exception:

System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.
   at System.Security.Cryptography.RijndaelManaged..ctor()

To Reproduce
Steps to reproduce the behavior. Please include any applicable artifacts that we could use to replicate the issue(e.g. files, registry keys, screenshots, etc.)

1. Enable the GPO "Use FIPS compliant algorithms for encryption, hashing, and signing"
2. Run Seatbealt running all modules

Expected behavior
Seatbelt should run successfully

Observed behavior
Errors with

System.InvalidOperationException: This implementation is not part of the Windows Platform FIPS validated cryptographic algorithms.
   at System.Security.Cryptography.RijndaelManaged..ctor()

Additional Context
See https:/GhostPack/Rubeus/pull/66/files

[parzel]

I found a workaround via this post