Ransomware

Discovered by a malware researcher named S!Ri, Surtr is a ransomware program developed to encrypt various types of personal data. It is always common to see popular files like music, photos, and documents affected during the virus attack. Surtr uses the cybercriminals' e-mail (DecryptMyData@mailfence.com) and .SURT extension to rename all the blocked data. For example, a file like 1.pdf will change to 1.pdf.[DecryptMyData@mailfence.com].SURT and reset its original icon to blank. The same change will be applied to other data that went through the encryption. In addition, there are also two files getting created upon successful encryption - a text note called SURTR_README.txt and SURTR_README.hta that its meant to open a pop-up window. Both these files are used to deliver ransomware instructions for victims. You can take a close look at their contents here below:

Being part of the Dharma ransomware family, Dr is another file-encryptor that blocks access to data and demands its victims to pay money for the return. As soon as encryption comes into effect, all files stored on a system will be changed with the unique ID of victims, developers' e-mail address, and .dr extension. An affected sample like 1.pdf will transform into something like this 1.pdf.id-1E857D00.[dr.decrypt@aol.com].dr, and so forth with other types of encrypted data. The only variable information is victims' IDs, so they are most likely to be different for each infected user. After successful encryption, the virus creates a text note called FILES ENCRYPTED.txt. It also force-opens a pop-up window containing the same ransom instructions as in the note. Victims are given instructions to contact extortionists via e-mail communication. Their e-mail address is also visible inside of the new extension that is added to blocked data. In case developers do not respond within 12 hours, victims should write to another e-mail stated in the note. Furthermore, crooks behind Dr Ransomware also warn their victims to not rename files or use third-party tools to decrypt them. There is also no information on how much victims should pay for the decryption of their data as this will be known while contacting the frauds.

If your files have been encrypted and altered with the .wincrypto extension, then you are likely to be a victim of WinCrypto Ransomware. It is a high-risk infection blocking access to important data stored on a PC or network. After encryption, files like "1.pdf", "1.mp4", "1.png" and others with potentially valuable extensions will reset their icons to blank and have new extensions assigned. To illustrate, 1.pdf will change to 1.pdf.wincrypto, 1.mp4 to 1.mp4.wincrypto, "1.png" to 1.png.wincrypto and so forth with other file types. Once this part of encryption is done, the virus issues a text file called README WINCRYPTO.txt that stores ransom instructions. The same instructions are also presented inside of a pop-up window that is automatically opened. The text in both pop-window and note states all documents, photos, databases, and other important data have been strongly encrypted. To revert this and regain access to files, victims are guided to purchase the private key and special decryption software. The payment should be performed after downloading the TOR browser and contacting developers via the link. After that, victims will be involved in a conversation to get further instructions. Unfortunately, no third-party tools are currently able to decrypt data compromised by WinCrypto Ransomware with a 100% guarantee.

Architek is a ransomware program that strikes important data by locking access to it. The virus, therefore, asks its victims to pay the so-called ransom to get unique decryption software and lift the assigned blockage. Infected users will also see their files changed with the .architek extension. For instance, a file like 1.pdf will change to 1.pdf.architek and reset its original icon. The ransomware also creates a text note called How to decrypt files.txt to explain decryption instructions. The note says users' network has been encrypted due to poor security. In order to return access to their files, victims should contact developers. Even though there is no estimated price written by the extortionists, it is mentioned the price of decryption depends on how fast victims contact through the given TOR link. In case you refuse to follow the listed steps, cybercriminals threaten to share your data with third parties potentially interested in it. As a guarantee that they are able to decrypt your data, extortionists offer to send a couple of files. They will decrypt them for free and so-prove that they can be trusted. Unfortunately, this is not always the case with cybercriminals as they are prone to fool their victims and not send any decryption tools regardless. Despite this, it might be impossible to decrypt the entire data completely without the help of cybercriminals.

STOP/Djvu has been one of the most popular and devasting ransomware families that target a lot of worldwide users. It is operated by experienced developers that create and issue new ransomware versions on a regular basis. Alike other malware of this type, STOP/Djvu uses strong cryptographic algorithms along with assigning custom extensions to restrict access to data. After this, users become unable to open their files as they are blocked with secure ciphers. While being depressed and mentally down after receiving the virus, cybercriminals offer a file-saving solution - to buy special decryption software that will return access to data. They show ransom instructions inside of a note (.txt, HTML, or pop-up window) that is created at the end of encryption. Victims are often instructed to contact developers and send an estimated sum of money in BTC or other cryptocurrencies. However, it is obvious that many would like to avoid it and recover the files for free or at least at a low price. This is exactly what we are going to talk about today. Follow our guide below to learn all the necessary steps you should apply to decrypt or restore files blocked by STOP/Djvu.

NRCL blocks access to data and asks its victims to pay the so-called ransom. Malware that runs data encryption and extorts money from the infected is usually categorized as ransomware. NRCL does it using strong cryptographic ciphers to prevent manual file decryption. Upon its successful encryption, files stored on a system will undergo two visual changes - the new .NRCL extension and icons reset to blank. A sample that went through these changes would look something like this 1.pdf.NRCL. In addition, NRCL creates a text file called Note.txt with instructions on how to return your data. The same information is also concealed inside of a small decryption utility that can be opened through NRCL_Decryptor.exe. The content of both files says there is only one way to recover your data - pay 300$ for the decryption. Extortionists also guide victims to not shut their PC or run manipulations with files. To complete the payment and get a special decryption key, victims have to contact developers via e-mail communication. After that, victims should receive the key, insert it into the dedicated space of the pop-up window and click on Decrypt. However, at the moment of writing this article, malware experts found that e-mails provided by NRCL are non-existent meaning this ransomware can still be under development.

MME is categorized as a ransomware infection that spreads into unprotected systems to encrypt data and extort money from victims for its return. The virus uses its own extension (.MME) to highlight the blocked data and make users spot its restriction. For instance, a previously untouched file called 1.pdf will change to 1.pdf.MME and reset its original icon upon successful encryption. As a result of this change, victims will no longer be able to access the file. In order to fix this and get back to regular usage of files, cybercriminals offer to opt for the paid solution - buy special decryption software that will return your data. Instructions to do are listed in a text note named Read_Me.txt that comes along with the encryption. You can take a look at its detailed content here below:

BLUE LOCKER is a high-risk infection classified as ransomware. Its main purpose lies in extorting money from victims after successful encryption of personal data. It assigns the new .blue extension and issues a text note called restore_file.txt to guide victims through the recovery process. This means a file like 1.pdf will be altered to 1.pdf.blue and reset its original icon. The text inside of the note is similar to other ransomware infections. It is said that all files have been encrypted, backups deleted, and copied to the server of cybercriminals. To revert the damage and return back to normal experience with fully functioning files, victims should buy a universal decryptor held by malware developers. If you decide to ignore the requests of cybercriminals, they will start flushing your files on dark web resources. While contacting developers on the decryption, it is offered to send 1 file so they can unlock it for free. Communication between victims and cybercriminals is written to be established via e-mail methods (grepmord@protonmail.com). After getting in touch with them, victims will retrieve further instructions on how to pay and acquire the decryption software.