![]() It is generally impossible to decode files without tools held only by the developers. The main differences are usually cost of decryption, and cryptographic algorithm ( symmetric or asymmetric) used to encrypt data. Most ransomware-type programs are quite similar - they encrypt data and provide victims with instructions about how to pay the ransom. Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data: Even if ransomware is removed/uninstalled, however, encrypted files remain inaccessible - removal of ransomware only prevents it from causing further file encryption. Generally, the only way to recover files without their involvement is to restore files from a backup. In many cases, people trust and pay ransomware developers, and are then scammed. Do not pay cyber criminals for this tool, since there is a high probability that they will not send anything. Therefore, the only way to decrypt files is to use the correct tool. Like most programs of this type, Derp encrypts data using a strong encryption algorithm. Unfortunately, this information is accurate. It is made clear that it is impossible to decrypt files without purchasing decryption tools held only by the cyber criminals who developed Derp. If not, they must pay the full cost of $980. To purchase decryption tools at a discount price ($490), victims are encouraged to contact cyber criminals within 72 hours of encryption. Victims are permitted to send one encrypted file, which Derp developers should decrypt free of charge. The "_readme.txt" file contains a ransom message with instructions about how to obtain a decryption tool and key - victims must contact Derp's developers by sending an email to or The message must contain the appointed personal ID. ![]() It also creates a text files named " _readme.txt" and stores a copy in every folder that contains encrypted data. Furthermore, Derp renames all encrypted files by changing their extensions to ". Like most programs of this type, it encrypts files so that victims cannot access or use them unless they pay ransoms to cyber criminals. Derp is a part of a ransomware family called Djvu. We’re ISO/IEC certified and GDPR and eIDAS compliant and use advanced TLS encryption across our site for secure document processing.Derp is malicious software categorized as ransomware. We take your security and privacy very seriously at Smallpdf.
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