Mimo-UniDll-x64-v5.2.0.0-password-12345.zip is a patch or "emulator" used for the 1C:Enterprise (1С:Предприятие)
If you are unsure of the source, it is safest to delete the file. Most reputable software does not require a simple "12345" password for a ZIP download unless it is trying to bypass email or browser security filters. Mimo-UniDll-x64-v5.2.0.0-password-12345.zip
If you have downloaded this file, do not enter the password to extract it. Delete the archive immediately. Run a Full System Scan: Mimo-UniDll-x64-v5
Disable your antivirus temporarily if it flags the DLL (common with "patching" tools), but only if you have verified the source. : Mimo-UniDll-x64-v5.2.0.0-password-12345.zip