Extract text from encrypted files (EFDC)
To convert EFDC files to another format, you need Emsisoft Decryptor or other Encoded software.
To convert other file formats to the "Malicious Encryption" file type, you need software like Emsisoft Decryptor or a similar tool.
The .EFDC file extension is exclusively associated with the STOP/Djvu ransomware family. When a computer is infected, this malware targets common user files - such as JPG, ZIP, and EXE - encrypts their contents using a strong cryptographic algorithm, and appends the .efdc extension. These files are typically personal documents, images, or archives that are now locked and completely inaccessible to normal software.
There is no conventional software to simply 'open' or 'edit' these files. Recovery heavily relies on specific decryption tools provided by security researchers, such as the Emsisoft Decryptor for STOP Djvu. If the files were encrypted using an 'online' key unique to the computer, decryption might currently be impossible without the cybercriminals' private key.
Victims often attempt to convert .EFDC files back to their original target formats like JPG, PDF, or DOCX. However, this presents a severe conversion challenge: this is an encryption process, not a standard file format change. The internal data structure is mathematically scrambled. Simply removing the .efdc extension or using a standard image converter will fail because the original file headers are masked or destroyed.
Because this is a closed, malicious encryption scheme, standard online converters fail to process it. However, convert.guru can still identify the file format, inspect the file, and show text or internal content. Just drag and drop your file to see what it is and analyse it. If our analysis detects surviving underlying metadata, or if you simply need to view the raw hexadecimal data to verify the extent of the encryption, viewing the file's raw state may still be possible.
Convert.Guru analyzes your EFDC file, detects the exact format, and lets you read the text inside.
Users also converted LSR, BS and TLV files.
If you want to convert EFDC file to BASE64, HEX, BIN, ENC, CRYPT, AES, DES, RSA, PGP, GPG, ASC or KEY, you can use Emsisoft Decryptor or similar software from the "Ransomware Encrypted File" category. In the File menu, look for Save As… or Export….
To convert CER, BIN, PEM, DER, KEY, P7S, PFX, ENC, P12, BASE64, P7B or HEX files to EFDC, try Emsisoft Decryptor or another comparable tool in the "Ransomware Encrypted File" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our EFDC converter.