Files with crypt1 extension can also be found on computers affected by the UltraCrypter ransomware.
There is one other file type using
the CRYPT1 file extension!
.crypt1 - WhatsApp Messenger encrypted backup
CRYPT1 file extension - UltraCrypter ransomware encrypted file
What is crypt1 file? How to open crypt1 files?
File type specification:
File extension crypt1 can also be encountered on files that were encrypted and had their suffix renamed by UltraCrypter ransomware (cryp1, .crypz, or .crypt)
The only way to recover these files would be to look for ransomware decrypter.