If you are looking for a functional file rather than an archival record, "B037" frequently refers to the following:
This is likely a cryptographic hash or a unique UID (Unique Identifier). It ensures that the file you are downloading is exactly what the provider intended, protecting you from corrupted data or security breaches. The Status (updated): download file b037 cccn15bbr7z002860 mb updated
Those sites often repackage malware or adware. 90% of such cryptic file names on open directories are traps. If you are looking for a functional file