The installdra argument seems to be related to installing a Data Recovery Agent (DRA) for EFS. A DRA is a special type of account that can recover encrypted files in case the original encryption key is lost or corrupted.
Typically located in the C:\Windows\System32 directory efsui.exe efs installdra
After conducting research, I found that efsui.exe is a legitimate executable file associated with the Encrypting File System (EFS) in Windows. The installdra argument seems to be related to
EFS UI Application
Here's a report on the topic: