How to uninstall BigBossRoss ransomware?

Also Known As: BigBossRoss virus
Distribution: Moderate
Damage level: Severe

BigBossRoss ransomware removal instructions

What is BigBossRoss?

BigBossRoss is a new variant of Garrantydecrypt ransomware. It is designed to prevent its victims from accessing their files by encrypting them. In order to decrypt files victims are forced to purchase a decryption tool from cyber criminals who designed this ransomware. BigBossRoss appends the ".bigbossross" extension to filenames of all encrypted files, for example, it renames "1.jpg" to "1.jpg.bigbossross", and so forth. Also, it creates the "#Decryption#.txt" which contains instructions on how to contact developers of the BigBossRoss ransomware.

These cyber criminals can be contacted via email ( or Jabber ( The "#Decryption#.txt" text file contains mostly instructions on how to install the Jabber application. Typically, cyber criminals behind ransomware-type programs are the only ones who can help their victims to decrypt encrypted files. In other words, they are the only ones who have tools that can decrypt files encrypted by their ransomware. Another problem is that most cyber criminals cannot be trusted, quite often they do not provide decryption software (and/or key) even after receiving a ransom/payment. Typically, the only way to avoid being scammed and recover files without using decryption tools that can be purchased from cyber criminals is to restore them from an existing data backup. Besides, removing ransomware from the system only prevents it from causing further encryptions, all encrypted files remain encrypted.

Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:

BigBossRoss decrypt instructions

Most ransomware-type programs are designed to operate very similarly: they lock (encrypt) data and create and/or display a ransom note that contains instructions on how to contact cyber criminals and other details. The two main differences usually are price of a decryption software and/or key and cryptographic algorithm (symmetric or asymmetric) that is used to encrypt data. Here are some examples of other ransomware: Mapo, Bitx and ROGER. Unfortunately, in most cases it is impossible to decrypt files encrypted by ransomware without the tools that only developers of a particular ransomware can provide. It is possible to recover files without using their tools only if ransomware is not completed (contains bugs, flaws, etc.). That is why it is important to always have data backed up and store it on a remote server or unplugged storage device.

How did ransomware infect my computer?

Most cyber criminals spread ransomware and other malware through emails, Trojans, unreliable file and software download channels, unofficial activation tools and fake updaters. They attempt to proliferate ransomware through emails by sending emails that have malicious files attached to them. Those files, if opened, infect systems with malware. Examples of most commonly used files are Microsoft Office, PDF documents, archive files like ZIP, RAR, executable files like .exe and JavaScript files. Trojans are malicious programs that often are designed to cause chain infections. However, a Trojan can install malware only if a computer is already infected with it. To distribute malware through unreliable download channels cyber criminals upload malicious files and hope that someone will download and open them. Once opened, those files install malicious programs/infect computers. Examples of download sources that can be used to distribute malware are third party downloaders, free file hosting websites, Peer-to-Peer networks (like torrents, eMule), freeware download pages, unofficial websites, etc. Unofficial software activation tools supposed to bypass paid activation of licensed software. However, quite often these tools simply install of malware instead. Fake software updaters, if used, either install malicious software instead of updates or exploit bugs, flaws of outdated software that is installed on a computer.

Threat Summary:
Name BigBossRoss virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .bigbossross
Ransom Demanding Message #Decryption#.txt 
Cyber Criminal Contact and (Jabber)
Detection Names Avast (Win32:Dh-A [Heur]), BitDefender (Gen:Heur.Ransom.Imps.1), ESET-NOD32 (A Variant Of Win32/Filecoder.Paradise.A), Kaspersky (Trojan.Win32.DelShad.bpl), Full List Of Detections (VirusTotal)
Symptoms Cannot open files stored on your computer, previously functional files now have a different extension (for example, my.docx.locked). A ransom demand message is displayed on your desktop. Cyber criminals demand payment of a ransom (usually in bitcoins) to unlock your files.
Distribution methods Infected email attachments (macros), torrent websites, malicious ads.
Damage All files are encrypted and cannot be opened without paying a ransom. Additional password-stealing trojans and malware infections can be installed together with a ransomware infection.

To eliminate BigBossRoss virus our malware researchers recommend scanning your computer with Spyhunter.
▼ Download Spyhunter
Free scanner checks if your computer is infected. To remove malware, you have to purchase the full version of Spyhunter.

How to protect yourself from ransomware infections?

Attachments or web links that are presented in irrelevant emails, especially if those emails are received from unknown, suspicious addresses should not be opened. Software should be downloaded only via direct download links and official pages. Other sources that we mentioned in the paragraph above should not be trusted. Furthermore, installed programs must be updated via tools or implemented functions that are designed by official developers, the same applies to activation of programs that require to be activated. Besides, 'cracking' tools (unofficial activators) are not legal and often cause installation of malware. And finally, it is recommended to have a reputable antivirus or anti-spyware suite on the operating system installed and scan it regularly. If your computer is already infected with BigBossRoss, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in BigBossRoss ransomware's text file ("#Decryption#.txt"):

All your files have been ENCRYPTED!!!
Write to our email -
Or contact us via jabber -
Jabber client installation instructions:
Download the jabber (Pidgin) client from hxxps://

After installation, the Pidgin client will prompt you to create a new account.
Click - Add
In the -Protocol field, select XMPP
In -Username - come up with any name
In the field -domain - enter any jabber-server, there are a lot of them, for example -
Create a password
At the bottom, put a tick -Create account
Click add
If you selected -domain -, then a new window should appear in which you will need to re-enter your data:
You will need to follow the link to the captcha (there you will see the characters that you need to enter in the field below)
If you don't understand our Pidgin client installation instructions, you can find many installation tutorials on youtube - hxxps://
Do not rename encrypted files.
Do not try to decrypt your data using third party software, it may cause permanent data loss.
Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.
tell your unique ID

Screenshot of files encrypted by BigBossRoss (".bigbossross" extension):

Files encrypted by BigBossRoss

BigBossRoss ransomware removal:

Instant automatic removal of BigBossRoss 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 BigBossRoss 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":

Windows 10 users: Click the Windows logo and select the Power icon. In the opened menu click "Restart" while holding "Shift" button on your keyboard. In the "choose an option" window click on the "Troubleshoot", next select "Advanced options". In the advanced options menu select "Startup Settings" and click on the "Restart" button. In the following window you should click the "F5" button on your keyboard. This will restart your operating system in safe mode with networking.

windows 10 safe mode with networking

Video showing how to start Windows 10 in "Safe Mode with Networking":

Step 2

Log in to the account infected with the BigBossRoss 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 BigBossRoss 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 BigBossRoss 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 BigBossRoss 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 BigBossRoss, 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 encryption ransomware such as this, use reputable antivirus and anti-spyware programs. As an extra protection method, you can use programs called HitmanPro.Alert and EasySync CryptoMonitor, which artificially implant group policy objects into the registry to block rogue programs such as BigBossRoss ransomware.

Note that Windows 10 Fall Creators Update includes a "Controlled Folder Access" feature that blocks ransomware attempts to encrypt your files. By default, this feature automatically protects files stored in the Documents, Pictures, Videos, Music, Favorites, and Desktop folders.

Controll Folder Access

Windows 10 users should install this update to protect their data from ransomware attacks. Here is more information on how to get this update and add an additional protection layer from ransomware infections.

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 BigBossRoss 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 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.

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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
BigBossRoss 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 BigBossRoss virus on your mobile device.
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