How to uninstall BigBossRoss ransomware

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

BigBossRoss ransomware removal instructions

What is BigBossRoss?

BigBossRoss is a new variant of Garrantydecrypt ransomware. It is designed to prevent victims from accessing their files by encryption. In order to decrypt files, victims are forced to purchase a decryption tool from the cyber criminals who designed this ransomware. BigBossRoss appends the ".bigbossross" extension to filenames of all encrypted files. For example, "1.jpg" becomes "1.jpg.bigbossross". It also creates the "#Decryption#.txt" file, which contains instructions about how to contact the developers of BigBossRoss ransomware.

These cyber criminals can be contacted via email (bigbosshorse@ctemplar.com) or Jabber (bigbosshorse@xmpp.jp). The "#Decryption#.txt" text file contains mostly instructions about how to install the Jabber application. Typically, cyber criminals behind ransomware-type programs are the only people who can help victims to decrypt encrypted files - only they have tools that can decrypt files encrypted by their ransomware. No cyber criminals can be trusted. Often, they provide no decryption software or keys, even after receiving ransom payments. Typically, the only way to avoid being scammed and recover files (without using decryption tools purchased from cyber criminals) is to restore them from an existing data backup. Furthermore, removing ransomware from the system simply prevents it from causing further encryption - all encrypted files remain inaccessible.

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

BigBossRoss decrypt instructions

Most ransomware-type programs have similar functions: they lock (encrypt) data and create and/or display a ransom message that contains instructions about how to contact cyber criminals and other details. Main differences are usually cost of decryption software and/or key and cryptographic algorithm (symmetric or asymmetric) used to encrypt data. Some examples of other ransomware are Mapo, Bitx and ROGER. Unfortunately, in most cases, it is impossible to decrypt files encrypted by ransomware without the tools held only by the developers of specific ransomware, unless the ransomware is not complete (contains bugs, flaws, etc.). Therefore, have your data backed up and store it on a remote server or unplugged storage device.

How did ransomware infect my computer?

Most cyber criminals proliferate ransomware and other malware through emails, Trojans, dubious file and software download channels, unofficial activation tools and fake updaters. They attempt to spread ransomware through emails by sending messages that have malicious files attached to them. If opened, the files infect systems with malware. Examples of most commonly used files are Microsoft Office, PDF documents, archive files such as ZIP, RAR, executable files such as .exe, and JavaScript files. Trojans are malicious programs that cause chain infections, however, a Trojan can install malware only if the computer is already infected with it. Criminals distribute malware through dubious download channels by uploading malicious files and hoping that someone will download and open them. Once opened, the files install malicious programs to 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 (torrents, eMule), freeware download pages, unofficial websites, etc. Unofficial software activation tools supposedly bypass paid activation of licensed software, however, these tools can install malware instead. Fake software updaters install malicious software rather than updates, or exploit bugs/flaws of outdated software that is installed on the 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 bigbosshorse@ctemplar.com and bigbosshorse@xmpp.jp (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.
Malware Removal (Windows)

To eliminate possible malware infections, scan your computer with legitimate antivirus software. Our security researchers recommend using Malwarebytes.
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How to protect yourself from ransomware infections

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

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

All your files have been ENCRYPTED!!!
Write to our email - bigbosshorse@ctemplar.com
Or contact us via jabber - bigbosshorse@xmpp.jp
Jabber client installation instructions:
Download the jabber (Pidgin) client from hxxps://pidgin.im/download/windows/

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 - exploit.im
Create a password
At the bottom, put a tick -Create account
Click add
If you selected -domain - exploit.im, then a new window should appear in which you will need to re-enter your data:
User
password
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://www.youtube.com/results?search_query=pidgin+jabber+install
Attention!
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 malware removal: Manual threat removal might be a lengthy and complicated process that requires advanced computer skills. Malwarebytes is a professional automatic malware removal tool that is recommended to get rid of malware. Download it by clicking the button below:
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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 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.

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Malware activity

Global malware activity level today:

Medium threat activity

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

QR Code
BigBossRoss virus QR code
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