What is Obfuscated Ransomware

Obfuscated Ransomware (BigBobRoss Ransomware) is dangerous encryption virus, that uses AES-128 encryption algorithm to cipher user’s files. After successful encryption it appends .obfuscated, .cheetah, .encryptedALL or .djvu extensions (latest versions also add prefix [id={8-digit-code}]). Obfuscated Ransomware creates ransom note called Read me.txt (or How to recover your files.txt for .cheetah version), and puts it on the desktop and in the folders with encoded data. It also modifies desktop wallpaper, placing text on white background. Here is the content:

.obfuscated version.djvu version.cheetah version
Hello, dear friend!
1- [All your files have been ENCRYPTED!] Your files are NOT damaged! Your files are modified only.
The only way to decrypt your files is to receive the decryption program.
your files can not be decrypted without the special program we made it for your computer.
2- [ HOW TO RETURN FILES? ] To receive the decryption program Write to our email "BigBobRoss@computer4u.com"
and tell us your unique ID
3- [ FREE DECRYPTION! ] Free decryption as guarantee.
We guarantee the receipt of the decryption program after payment.
To believe, you can give us 1 file that must be less than 1MB and we decrypt it for free.
File should not be important to you! databases, backups, large excel sheets, etc.
4- [ Instruction ] the easiest way to buy bitcoins is LocalBitcoins site. you have to register, click "buy bitcoins"
and select the seller by payment method and price.
please do not change the name of files or file extension if your files are important to you!
Your unique ID : *** [8 uppercase hex]
-------------------------- ALL YOUR FILES ARE ENCRYPTED -----------------------------
Your personal ID:[redacted 8 uppercase hex] Don't worry, you can return all your files!
All your files documents, photos, databases and other important are encrypted with strongest encryption and unique key.
The only method of recovering files is to purchase decrypt tool and unique key for you.
This software will decrypt all your encrypted files.
What guarantees do we give to you?
You can send one of your encrypted file from your PC and we decrypt it for free.
But we can decrypt only 1 file less than 1Mb for free. File must not contain valuable information
Don't try to use third-party decrypt tools because it will destroy your files.
You have to pay for decryption in Bitcoins. The price depends on how fast you write to us.
To get this software you need write on our e-mail:
Reserve e-mail address to contact us:

---------------------------------------------- ALL YOUR FILES ARE ENCRYPTED -----------------------------------------------
Your unique ID:XXXXXXXX
All your files documents, photos, databases and other files are encrypted with strongest encryption!
Dont worry, you can return all your files!
To receive the decryption tool contact us and tell us your unique ID
If you want your files You have to pay for decryption in Bitcoins
The price depends on how fast you write to us.
Free decryption as guarantee!
Send me your unique ID and 1-2 small encrypted files The total size of files must be less than 10Mb non archived for free decryption.
After payment we will send you the decryption tool that will decrypt all your files.
You can buy bitcoin from here:
1-Don't try to use third-party decrypt tools because it will destroy your files.
2-Please do not change the name of files or file extension if your files are important to you!
If you want return all of your files write on our e-mail:

Malefactors allow to decrypt 1 file under 1 Mb of size for free, as a proof of operability. Obfuscated Ransomware attacks significant files, such as photos, videos, documents, databases, etc. Virus focuses on English-speaking users, which does not prevent spread throughout the world. The first victims are from Moldova. It is currently unknown, how much they want for decryption. Of course, we do not recommend to pay the ransom, as there are many cases when hackers don’t send master keys or decryptors. There is still a chance decryption tool will be released by antivirus companies or security enthusiasts. You can also follow instructions below to attempt restoring files using typical methods and recovery software. Read the guide on this page to remove Obfuscated Ransomware and decrypt .obfuscated, .cheetah, .encryptedALL or .djvu files in Windows 10, Windows 8 and Windows 7.

Obfuscated (BigBobRoss) Ransomware

How Obfuscated Ransomware infected your PC

Obfuscated Ransomware virus is propagated via spam attack with malicious e-mail attachments and by manual PC hacking. Can be distributed by hacking through an unprotected RDP configuration, fraudulent downloads, exploits, web injections, fake updates, repackaged and infected installers. Virus assigns certain ID with the victims, that is used to name those files and supposedly to send decryption key. In order to prevent infection with this type of threats in future we recommend you to use SpyHunter 5 or Norton Antivirus.

Download Obfuscated Ransomware Removal Tool

Download Removal Tool

To remove Obfuscated Ransomware completely, we recommend you to use Norton Antivirus from Symantec. It detects and removes all files, folders and registry keys of Obfuscated Ransomware.

How to remove Obfuscated Ransomware manually

It is not recommended to remove Obfuscated Ransomware manually, for safer solution use Removal Tools instead.

Obfuscated Ransomware files:

Read Me.txt

Obfuscated Ransomware registry keys:

no information

How to decrypt and restore .obfuscated, .cheetah, .encryptedALL or .djvu files

EmsiSoft and Avast released decryption tools, that can decrypt .obfuscated files encrypted by BigBobRoss for free. Unfortunately, .encryptedALL, .cheetah and .djvu variants cannot be decrypted at the moment, but there is a great chance those tools will be updated soon.

Use automated decryptors

Decryption Tool from EmsiSoft

emsisoft bigbobross ransomware decryptor

Use following tool from EmsiSoft called EmsiSoft Decrypter for BigBobRoss, that can decrypt .obfuscated files. Download it here:

Download Emsisoft Decrypter

Decryption Tool from Avast

avast obfuscated ransomware decryptor

Use following tool from Avast called Avast Decryption Tool for BigBobRoss, that can decrypt .obfuscated files. Download it here:

Download Avast Decrypter

There is no purpose to pay the ransom, because there is no guarantee you will receive the key, but you will put your bank credentials at risk.

If you are infected with Obfuscated Ransomware and removed it from your computer you can try to decrypt your files. Antivirus vendors and individuals create free decryptors for some crypto-lockers. To attempt to decrypt them manually you can do the following:

Use Stellar Phoenix Data Recovery Pro to restore .obfuscated, .cheetah, .encryptedALL or .djvu files

  1. Download Stellar Phoenix Data Recovery Pro.
  2. Select location to scan for lost files and click Scan button.
  3. Wait until Quick and Deep scans finish.
  4. Preview found files and restore them.

Using Windows Previous Versions option:

  1. Right-click on infected file and choose Properties.
  2. Select Previous Versions tab.
  3. Choose particular version of the file and click Copy.
  4. To restore the selected file and replace the existing one, click on the Restore button.
  5. In case there is no items in the list choose alternative method.

Using Shadow Explorer:

  1. Download Shadow Explorer program.
  2. Run it and you will see screen listing of all the drives and the dates that shadow copy was created.
  3. Select the drive and date that you want to restore from.
  4. Right-click on a folder name and select Export.
  5. In case there are no other dates in the list, choose alternative method.

If you are using Dropbox:

  1. Login to the DropBox website and go to the folder that contains encrypted files.
  2. Right-click on the encrypted file and select Previous Versions.
  3. Select the version of the file you wish to restore and click on the Restore button.

How to protect computer from viruses like Obfuscated Ransomware in future

1. Get special anti-ransomware software

Use ZoneAlarm Anti-Ransomware

Famous antivirus brand ZoneAlarm by Check Point released a comprehensive tool, that will help you with active anti-ransomware protection, as an additional shield to your current protection. The tool provides Zero-Day protection against ransomware and allows you to recover files. ZoneAlarm Anti-Ransomware is compatible with all other antiviruses, firewalls, and security software except ZoneAlarm Extreme (already shipped with ZoneAlarm Anti-Ransomware) or Check Point Endpoint products. The killer features of this application are: automatic file recovery, overwrite protection that instantly and automatically recovers any encrypted files, file protection that detects and blocks even unknown encryptors.

Download ZoneAlarm Anti-Ransomware

2. Back up your files

onedrive backup

Regardless of success of protection against ransomware threats, you can save your files using simple online backup. Cloud services are quite fast and cheap nowadays. There is more sense using online backup, than creating physical drives, that can get infected and encrypted when connected to PC or get damaged from dropping or hitting. Windows 10 and 8/8.1 users can find pre-installed OneDrive backup solution from Microsoft. It is actually one of the best backup services on the market, and has reasonable pricing plans. Users of earlier versions can get acquainted with it here. Make sure to backup and sync most important files and folders in OneDrive.

3. Do not open spam e-mails and protect your mailbox

mailwasher pro

Malicious attachments to spam or phishing e-mails is most popular method of ransomware distribution. Using spam filters and creating anti-spam rules is good practice. One of the world leaders in anti-spam protection is MailWasher Pro. It works with various desktop applications, and provides very high level of anti-spam protection.

Download MailWasher Pro
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