MISCHA Ransomware

Also Known As: Mischa virus
Distribution: Low
Damage level: Severe

MISCHA ransomware removal instructions

What is MISCHA?

Created by the developers of Petya, Mischa is another ransomware virus that infiltrates victims' computers and then encrypts files. This virus is distributed using malicious email attachments that are commonly delivered as fake job application forms. The files are encrypted using the asymmetric algorithm and, thus, two keys (public to encrypt and private to decrypt) are generated during encryption. Mischa extends the names of encrypted files with one of the following extensions: .cRh8, .3P7m, .aRpt, .eQTz, or .3RNu. This ransomware also creates .txt and .html files (both named YOUR_FILES_ARE_ENCRYPTED) and places them in each folder containing the encrypted files.

The .txt and .html files contain an identical message stating that victims' files have been encrypted and that they can only be restored by paying a ransom. The aforementioned private key is stored on a remote server controlled by cyber criminals - victims must supposedly buy this key. When infected email attachments are opened and administrator permission given, Petya ransomware is installed. If, however, the user decides to declines permission, Mischa ransomware is installed. Unlike Petya (which locks computers), Mischa behaves like other regular ransomware. Mischa demands 1.9404 Bitcoin (~$882.88). Compared to other viruses, this ransom is quite large, since the size often fluctuates between 0.5 and 1.5 Bitcoin. Unfortunately, there currently are no tools capable of decrypting files compromised by this ransomware. Therefore, victims can only restore their files/system from a backup.

Screenshot of a message encouraging users to contact the developers of MISCHA ransomware to decrypt their compromised data:

MISCHA decrypt instructions

Mischa is very similar to Samsam, Locky, Cerber, and dozens of other viruses. Be aware that all ransomware is designed to encrypt victims' files and demand ransoms. The only difference between these viruses is the size of ransom and type of algorithm used to encrypt, however, research shows that many cyber criminals take no action even if victims pay the ransom. Thus, paying does not guarantee that your files will ever be decrypted. For these reasons, you should never attempt to contact cyber criminals or pay any ransoms. Ransomware-type viruses are often distributed using peer-to-peer networks (for example, Torrent), malicious email attachments, fake software updates, and trojans. Therefore, be cautious when downloading files from third party sources and opening attachments sent from unrecognized and/or suspicious email addresses. In addition, keep your installed software up-to-date and use legitimate anti-virus/anti-spyware software.

Screenshot of YOUR_FILES_ARE_ENCRYPTED.txt file:

MISCHA creating html file

Text presented within this file:

You became victim of the MISCHA RANSOMWARE!
The files on your computer have been encrypted with an military grade encryption algorithm. There is no way to
restore your data without a special key. You can purchase this key on the darknet page shown in step 2.
To purchase your key and restore your data, please follow these three easy steps:
1. Download the Tor Browser at "hxxps://www.torproject.org/". If you need help, please google for "access onion page".
2. Visit one of the following pages with the Tor Browser:
3. Enter your personal decryption code there:

Janus Cybercrime affiliate web (Cyber criminals responsible for developing Petya and MISCHA ransomware are now offering ransomware as a service):

Ransomware MISCHA affiliate Janus

Text presented within this page:

Profit from PETYA & MISCHA!
High infection rates
PETYA comes bundled with his little brother MISCHA. Since PETYA can't do his evil work without administrative privileges, MISCHA launches when those can't be obtained.
PETYA does a low level encryption of the disk, which is a completely new technique in ransomware. MISCHA acts as an traditional file-based ransomware. Provably fair
As professional cybercriminals, we know that you can't trust anyone. So we developed a payment system based on multisig addresses, where no one (including us) can rip you off.
We provide you FUD crypted binarys, and that 24/7. No need to buy shitty crypters or waste your money on expensive crypting services. Additionally, for our distributors with the highest volume, we provide a private stub. That means a even more stable infection rate.
Administrative Tasks live viewing the latest infections, setting the ransom price or recrypting your binary can be done with an clean and simple web-interface. We also have an qualified support, which will help you with any problems. Since this project is still in beta, we are open for any bug-report or feature-request.
Your share on the payments you have generated is calculated with the following table. The more volume you generate in one week, the more share on the profit you get. Example: if you generate a volume of 125 BTC, you get a payout of 106.25 BTC. That are at the moment about 45,000 USD! To get a volume over 100 BTC is not a big deal with the right technique!

MISCHA's website payment steps:

MISCHA ransomware payment step 1 MISCHA ransomware payment step 3

Text presented within these pages:

Step 1: Enter your personal identifier
First you have to enter your personal identifier. This code contains important informations for the decryption process. It's important that you enter it exactly like shown on the encrypted computer. The code contains a checksum, which prevents typos and ensures a successfull decryption.
You can copy paste it from the files that are in the directories with encrypted files.
Step 3: Do a bitcoin transaction
Now you have to send your purchased Bitcoins to the payment address. If you just purchased Bitcoins on a exchange or marketplace site, look for a section called "withdraw" and enter the details shown below. If you already own Bitcoins, send the right amount to the payment address shown below, directly from the wallet you use.
If you have any problems with the transaction, feel free to contact our support.
1.94040000 Bitcoins
After you made the payment transaction, you have to wait until we manually confirm it. This process usually takes a few hours. In some rare cases some payments need more time to get confirmed. Please refresh this page to see if your payment got confirmed.

MISCHA's website FAQ:

MISCHA ransomware web FAQ

Text presented within this page:

FAQ - Frequently Asked Questions
Why is the infection screen shown before windows starts?
Our system has a strong physical low level encryption, which encrypts all of your data storages, include usb devices. Windows repair programs or other diagnostic tools can't restore any data.
What will happen if I just reinstall my computer?
All your data will be irreversible destroyed and you have to buy a new windows license. Nobody can restore any data without your personal decryption key.
Which encryption algorithms are used? The RSA (cryptosystem) 4096 bit and Advanced Encryption Standard (AES) 256 bit are used. Both systems are very secure and can't be bypassed or cracked.
What can i do?
Follow the decryption wizard on this page. It will help you with the payment and the decryption of your computer. In some cases your personal data will published to the darknet if you don't pay!

MISCHA's web support:

MISCHA ransomware web support

Text presented within this page:

If you have any problems with the payment or the decryption process, you can send us a message. Please write your message in english, our russian speaking staff is not always available.

MISCHA ransomware removal:

Instant automatic removal of Mischa virus: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Spyhunter is a professional automatic malware removal tool that is recommended to get rid of Mischa virus. Download it by clicking the button below:
▼ DOWNLOAD Spyhunter By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

Quick menu:

Step 1

Windows XP and Windows 7 users: Start your computer in Safe Mode. Click Start, click Shut Down, click Restart, click OK. During your computer start process, press the F8 key on your keyboard multiple times until you see the Windows Advanced Option menu, and then select Safe Mode with Networking from the list.

Safe Mode with Networking

Video showing how to start Windows 7 in "Safe Mode with Networking":

Windows 8 users: Start Windows 8 is Safe Mode with Networking - Go to Windows 8 Start Screen, type Advanced, in the search results select Settings. Click Advanced startup options, in the opened "General PC Settings" window, select Advanced startup. Click the "Restart now" button. Your computer will now restart into the "Advanced Startup options menu". Click the "Troubleshoot" button, and then click the "Advanced options" button. In the advanced option screen, click "Startup settings". Click the "Restart" button. Your PC will restart into the Startup Settings screen. Press F5 to boot in Safe Mode with Networking.

Windows 8 Safe Mode with networking

Video showing how to start Windows 8 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the MISCHA virus. Start your Internet browser and download a legitimate anti-spyware program. Update the anti-spyware software and start a full system scan. Remove all entries detected.

If you cannot start your computer in Safe Mode with Networking, try performing a System Restore.

Video showing how to remove ransomware virus using "Safe Mode with Command Prompt" and "System Restore":

1. During your computer start process, press the F8 key on your keyboard multiple times until the Windows Advanced Options menu appears, and then select Safe Mode with Command Prompt from the list and press ENTER.

Boot your computer in Safe Mode with Command Prompt

2. When Command Prompt mode loads, enter the following line: cd restore and press ENTER.

system restore using command prompt type cd restore

3. Next, type this line: rstrui.exe and press ENTER.

system restore using command prompt rstrui.exe

4. In the opened window, click "Next".

restore system files and settings

5. Select one of the available Restore Points and click "Next" (this will restore your computer system to an earlier time and date, prior to the MISCHA ransomware virus infiltrating your PC).

select a restore point

6. In the opened window, click "Yes".

run system restore

7. After restoring your computer to a previous date, download and scan your PC with recommended malware removal software to eliminate any remaining MISCHA ransomware files.

To restore individual files encrypted by this ransomware, try using Windows Previous Versions feature. This method is only effective if the System Restore function was enabled on an infected operating system. Note that some variants of MISCHA are known to remove Shadow Volume Copies of the files, so this method may not work on all computers.

To restore a file, right-click over it, go into Properties, and select the Previous Versions tab. If the relevant file has a Restore Point, select it and click the "Restore" button.

Restoring files encrypted by CryptoDefense

If you cannot start your computer in Safe Mode with Networking (or with Command Prompt), boot your computer using a rescue disk. Some variants of ransomware disable Safe Mode making its removal complicated. For this step, you require access to another computer.

To regain control of the files encrypted by MISCHA, you can also try using a program called Shadow Explorer. More information on how to use this program is available here.

shadow explorer screenshot

To protect your computer from file encrypting ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and Malwarebytes Anti-Ransomware, which artificially implant group policy objects into the registry to block rogue programs such as MISCHA ransomware.)

HitmanPro.Alert CryptoGuard - detects encryption of files and neutralises any attempts without need for user intervention:

hitmanproalert ransomware prevention application

Malwarebytes Anti-Ransomware Beta uses advanced proactive technology that monitors ransomware activity and terminates it immediately - before reaching users' files:

malwarebytes anti-ransomware

  • The best way to avoid damage from ransomware infections is to maintain regular up-to-date backups. More information on online backup solutions and data recovery software Here.

Other tools known to remove MISCHA ransomware:

About the author:

Tomas Meskauskas

Tomas Meskauskas - expert security researcher, professional malware analyst.

I am passionate about computer security and technology. I have an experience of over 10 years working in various companies related to computer technical issue solving and Internet security. I have been working as an author and editor for pcrisk.com since 2010. Follow me on Twitter and LinkedIn to stay informed about the latest online security threats. Contact Tomas Meskauskas.

PCrisk security portal is brought by a company RCS LT. Joined forces of security researchers help educate computer users about the latest online security threats. More information about the company RCS LT.

Our malware removal guides are free. However, if you want to support us you can send us a donation.

Removal Instructions in other languages
Malware activity

Global virus and spyware activity level today:

Medium threat activity

Increased attack rate of infections detected within the last 24 hours.

QR Code
Mischa virus QR code
A QR code (Quick Response Code) is a machine-readable code which stores URLs and other information. This code can be read using a camera on a smartphone or a tablet. Scan this QR code to have an easy access removal guide of Mischa virus on your mobile device.
We Recommend:

Get rid of Mischa virus today:

▼ REMOVE IT NOW with Spyhunter

Platform: Windows

Editors' Rating for Spyhunter:
Editors ratingOutstanding!

[Back to Top]

Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.