A file with a .crypt1 extension is encrypted by the UltraCrypter virus. UltraCrypter is a type of malware. It takes your files hostage and forces you to pay to unlock them. It may be introduced through an executable file disguised as another file. This is typically done through malicious ads or email spam. When it runs, it encrypts and renames files with a .crypt1 extension.
We will try to explain what the .crypt1 file is. We hope our site is useful. The .crypt1 files are associated with UltraCrypter Ransomware Encrypted Data. UltraCrypter Ransomware locks your computer or encrypts your files. It is encrypted so files cannot be opened by changing the extension.
The .crypt1 file extension is associated with WhatsApp Messenger. It can contain encrypted chat backups.
After CryptXXX ransomware rebranded into UltraCrypter, the extensions change often, latest being .crypt1. This ransomware focuses on valuable files to encrypt.
UltraCrypter encrypts files using RSA-2048 and AES CBC 256-bit encryption, appending .crypt1 extension. It offers to decrypt for 1.2 Bitcoins payment. We cannot recover files. If a decryptor is found, we will update this guide.
Another way to identify ransomware is to check the appended file extension. Many use generic extensions making identification hard. Use the ID Ransomware website.
Ransomware makes a delay between infection and encryption start to avoid detection. It is rather easy to remove CryptXXX and decrypt .crypt, .cryp1 or .crypz files with Kaspersky.
WhatsApp
Third-party decryption tools