If the file came from a "dupe client" or "mod menu" downloaded from a non-official source (e.g., Discord, MediaFire), it should be considered high-risk.
Part of a "dupe mod" or "dupe client" for item duplication exploits. dupe.pro.dll
A malicious file disguised as a "pro" version of a duplication tool. If the file came from a "dupe client"
Very old disk duplication software (e.g., "Disk Dupe Pro") used similar names in the 1990s. dupe.pro.dll
Use an antivirus like Malwarebytes or Windows Security to scan the specific folder where the file is located.