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Remove Microsoft Decryption Ransomware and Restore Encrypted Files

STF-cryptxxx-microsoft-decryption-ransomware-readme-ransom-note-readme-steps

Microsoft Decryption ransomware is the name of the latest variant in the CryptXXX family. Files get encrypted while retaining their names and extensions. That is clever as it might hindrance the detection of the malware for security software. An asymmetric algorithm for encryption is used based on RSA-4096. The decrypter the criminals have provided does not work, or at least that is what many victims report.

After encryption is complete, the ransomware will give you a personal ID, for you to use in any of the provided websites to pay. To see how to remove the ransomware and what you can try to recover your files, you should read the article carefully.

Threat Summary

NameMicrosoft Decryption
TypeRansomware
Short DescriptionThis variant of the CryptXXX ransomware is called Microsoft Decryption. All files including ones found on network drives will get encrypted, while preserving their names. The ransom money that is asked doubles if it is not paid within 100 hours.
SymptomsThe Microsoft Decryption ransomware encrypts files while these files preserve both their file names and extensions. Creates a few README files of different formats and gives links to certain sites, based on the TOR network. It demands payment to grant access to a decryption tool, which does not even work.
Distribution MethodEmail Attachments, Executable Files, Exploit Kits
Detection Tool See If Your System Has Been Affected by Microsoft Decryption

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User ExperienceJoin Our Forum to Discuss Microsoft Decryption.

Microsoft Decryption Ransomware – How Did I Get Infected?

Microsoft Decryption ransomware is a variant of CryptXXX, and the methods of infection are almost the same as its previous variants. The most effective way of spreading the infection is through an exploit kit. Infecting your computer with an exploit kit happens when you enter a website, which is compromised and will inject a malicious script from the Darkleech malware camapign. The exploit kit which is used this time is Neutrino. The kit might send a shockwave Flash exploit from where to make its entry.

Spam emails might also get you infected with Microsoft Decryption ransomware. The emails have might have malicious files attached, which are hidden from their true form. Social media or file-sharing networks could be spreading the ransomware further. DropBox was one of the platforms used to spread variants of the CryptXXX ransomware virus, in the past. Files can be presented as useful applications, so be careful in what you click and download.

Microsoft Decryption Ransomware – Technical Analysis

The Microsoft Decryption is the improved variant of the CryptXXX 3.0 ransomware.

This new variant encrypts files and demands ransom money as per usual. The newest thing about the ransomware is that uses a simple but in the same time clever trick to make its detection hard. The trick is that files preserve their filenames and their extensions. If left unpaid for 100 hours or around four days the price doubles. If your PC gets infected a registry key can be created, which is tied to this virus:

→HKCU\Software\Microsoft\Windows\CurrentVersion\Run

At a later moment, three files are downloaded through the exploit kit and left on a user’s desktop.

The files are the following:

  • README.txt
  • README.bmp
  • README.html

The .bmp file is put on your desktop as a background image. The .txt file contains the ransom message, and the .html file opens a browser to display the ransom message with enabled html code. That is done so the links to become clickable.

Here you see the full .html file loaded:

STF-cryptxxx-microsoft-decryption-ransomware-readme-ransom-note-full-readme

The file has links that redirect to payment sites which can redirect you once more after you enter your ID. Again, multiple domains are used, and they are all on the TOR network, so the cyber crooks can hide their location. All files contain the same text inside, which is also shown in the above image:

NOT YOUR LANGUAGE? USE https://translate.google.com

What happened to your files ?
All of your files were protected by a strong encryption with RSA4096
More information about the encryption keys using RSA4096 can be found here: http://en.wikipedia.org/wiki/RSA_(cryptosystem)

How did this happen ?
!!! Specially for your PC was generated personal RSA4096 Key , both public and private.
!!! ALL YOUR FILES were encrypted with the public key, which has been transferred to your computer via the Internet.
!!! Decrypting of your files is only possible with the help of the private key and decrypt program , which is on our Secret Server
What do I do ?
So , there are two ways you can choose: wait for a _miracle_ and get _your_ PRICE DOUBLED! Or start obtaining *BITCOIN NOW! , and restore _YOUR_ _DATA_ easy way If You have really valuable _DATA_, you better _NOT_ _WASTE_ _YOUR_ _TIME_, because there is _NO_ other way to get your files, except make a _PAYMENT_
Your personal ID:
For more specific instructions, please visit your personal home page, there are a few different addresses pointing to your page below:
1 – https://ccjlwb22w6c22p2k.onion(.)to
2 – https://ccjlwb22w6c22p2k.onion(.)city
If for some reasons the addresses are not available, follow these steps:
1. Download and install tor-browser: http://www.torproject.org/projects/torbrowser.html.en
2. Video instruction: https://www.youtube.com/watch?v=NQrUZdsw2hA
3. After a successful installation, run the browser
4. Type in the address bar: http://ccjlwb22w6c22p2k(.)onion

If you follow the provided instructions you will eventually end up on the page here:

STF-cryptxxx-microsoft-decryption-ransomware-decryption-payment-service-sites

After entering your personal ID number, you will enter the platform of the decryption service. There you will see the full payment instructions.

Microsoft Decryption ransomware asks the ransom price of 1.2 BitCoins, which is the equivalent of 788 US dollars, as initial payment. You will have around four days to pay. If you don’t make the payment, the price increases two times (2.4 Bitcoins), but no threats are being made about your files getting lost.

Do NOT pay these cyber criminals. They will keep making new iterations of their ransomware. Not only that, but they keep sticking to the same broken decryption tool, which just gives an error. No reason exists to lose your money on that by supporting the criminals financially.

The Microsoft Decryption ransomware encrypts files with the extensions encrypted by CryptXXX 3.0:

→.3dm, .aes, .ARC, .asc, .asf, .asm, .asp, .avi, .bak, .bat, .bmp, .brd, .cgm, .class, .cmd, .cpp, .crt, .csr, .CSV, .dbf, .dch, .dcu, .dif, .dip, .djv, .djvu, .doc, .DOC, .docb, .docm, .docx, .DOT, .dotm, .dotx, .eml, .fla, .flv, .frm, .gif, .gpg, .hwp, .ibd, .jar, .java, .jpeg, .jpg, .key, .lay, .lay6, .ldf, .max, .mdb, .mdf, .mid, .mkv, .mml, .mov, .mp3, .mp4, .mpeg, .mpg, .ms11, .MYD, .MYI, .NEF, .obj, .odb, .odg, .odp, .ods, .odt, .otg, .otp, .ots, .ott, .PAQ, .pas, .pdf, .pem, .php, .png, .pot, .potm, .potx, .ppam, .pps, .ppsm, .ppsx, .PPT, .pptm, .pptx, .psd, .qcow2, .rar, .raw, .RTF, .sch, .sldx, .slk, .sql, .SQLITE3, .SQLITEDB, .stc, .std, .sti, .stw, .svg, .swf, .sxc, .sxd, .sxi, .sxm, .sxw, .tar, .tar, .bz2, .tbk, .tgz, .tif, .tiff, .txt, .uop, .uot, .vbs, .vdi, .vmdk, .vmx, .vob, .wav, .wks, .wma, .wmv, .xlc, .xlm, .xls, .XLS, .xlsb, .xlsm, .xlsx, .xlt, .xltm, .xltx, .xlw, .xml, .zip, .zipx

The extension list might be a bit larger now with the latest variant, but the extensions in the above list are still being encrypted. When the encryption process fully completes, all files which are found on your computer and your network will remain with the names and extensions they had before the encryption.

The Microsoft Decryption ransomware uses an asymmetric RSA-4096 algorithm for encryption. That algorithm makes a public encryption key and a private decryption key.

Microsoft Decryption ransomware deletes Shadow Volume Copies from the Shadow Explorer process in the Windows Operating System, just like other variants of the ransomware.

Malware researchers from Kaspersky and TrendMicro have provided decryption tools for previous variants of the ransomware – you should read more about that in the article about Cryp1 (UltraCrypter) ransomware. Continue reading, to see how you can try to recover some of your files.

Remove Microsoft Decryption Ransomware and Restore Encrypted Files

If your computer got infected with Microsoft Decryption ransomware, you should have some experience in removing viruses. You should get rid of the ransomware as soon as possible because it will keep encrypting files. Even worse, the ransomware virus can infect other devices found on your network. The recommended action for you is to remove the virus and follow the step-by-step instructions manual provided below.

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Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

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Windows Mac OS X

How to Remove Microsoft Decryption from Windows.


Step 1: Boot Your PC In Safe Mode to isolate and remove Microsoft Decryption

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

1. Hold Windows key() + R


2. The "Run" Window will appear. In it, type "msconfig" and click OK.


3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK".
Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.


4. When prompted, click on "Restart" to go into Safe Mode.


5. You can recognise Safe Mode by the words written on the corners of your screen.


Step 2: Uninstall Microsoft Decryption and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:


1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.


2. In the field type in "appwiz.cpl" and press ENTER.


3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall"
Follow the instructions above and you will successfully uninstall most programs.


Step 3: Clean any registries, created by Microsoft Decryption on your computer.

The usually targeted registries of Windows machines are the following:

  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
  • HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Microsoft Decryption there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.


2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.


3. You can remove the value of the virus by right-clicking on it and removing it.
Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for Microsoft Decryption with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.


It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.


2. After you have installed SpyHunter, wait for it to update automatically.

SpyHunter5-update-2018


3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

SpyHunter5-Free-Scan-2018


4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

SpyHunter-5-Free-Scan-Next-2018

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by Microsoft Decryption.

Ransomware infections and Microsoft Decryption aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

If the above link does not work for you and your region, try the other two links below, that lead to the same product:

and

2. On the download page, click on the "Download" button:

3. Click on "Save File" button:

4. Accept all agreements and click "Next":

5. After all the "Next" steps, click on "Install" and then wait for the installation to complete:

6. Run the software. Click on the location to scan for missing or deleted files and click on "Scan":

7. Wait for the scan to complete, it may take some time. Be advised that this scan is not 100% guaranteed to recover all files, but it does have some chance to get your data back:


Windows Mac OS X

Get rid of Microsoft Decryption from Mac OS X.


Step 1: Uninstall Microsoft Decryption and remove related files and objects

OFFER
Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!
We Recommend To Scan Your Mac with SpyHunter for Mac
Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy


1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:


2. Find Activity Monitor and double-click it:


3. In the Activity Monitor look for any suspicious processes, belonging or related to Microsoft Decryption:

Tip: To quit a process completely, choose the “Force Quit” option.


4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.


5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Microsoft Decryption. If you find it, right-click on the app and select “Move to Trash”.


6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Microsoft Decryption. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.


7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

  • Go to Finder.
  • In the search bar type the name of the app that you want to remove.
  • Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
  • If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Microsoft Decryption via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Microsoft Decryption. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.


Step 2: Scan for and remove Microsoft Decryption files from your Mac

When you are facing problems on your Mac as a result of unwanted scripts and programs such as Microsoft Decryption, the recommended way of eliminating the threat is by using an anti-malware program. Combo Cleaner offers advanced security features along with other modules that will improve your Mac’s security and protect it in the future.


Step 3 (Optional): Try to Restore Files Encrypted by Microsoft Decryption on your Mac.

Ransomware for Mac Microsoft Decryption aims to encode all your files using an encryption algorithm which may be very difficult to decode, unless you pay money. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files, but only in some cases. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the recommended Data Recovery Mac app by clicking on the link underneath:

1 Comment

  1. AvatarBrijesh

    Hello mam

    Please share me any decryption tool for successful decrypt the .seto encrypted file hear i can attech some file for your reference on mail ID if you can share your ID . its very good memory of me and my daughter that why i am want that data back i tried so much but nothing will happen

    please help if you can

    Reply

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