Remove Rooster865qqZ ransomware from the operating system

Also Known As: Rooster865qqZ virus
Distribution: Low
Damage level: Severe

Rooster865qqZ ransomware removal instructions

What is Rooster865qqZ?

Rooster865qqZ belongs to the family of ransomware called Maoloa, the person who discovered this ransomware is Raby. It encrypts files and appends the ".Rooster865qqZ" extension to their filenames. For instance, it renames "1.jpg" to "1.jpg.Rooster865qqZ", and so on. Also, Rooster865qqZ displays a pop-up window, a ransom note that gets launched from the "HOW TO BACK YOUR FILES.exe" executable file.

Victims are informed that encrypted files can be recovered with a decryption tool. In order to get it, they have to send one image or text file to and provide the appointed ID number. Rooster865qqZ's developers offer to decrypt that file for free and send it back together with a price of decryption of all files and instructions on how to pay it. Also, victims are warned not to try to decrypt files by themselves (using other tools) because it will damage data. Simply said, victims are informed that the only way to decrypt files is by using tools that can be provided only by developers of this ransomware. Unfortunately, there are no other (and free) tools that could decrypt files encrypted by Rooster865qqZ, at least not at the moment. Another problem is that ransomware developers cannot be trusted, quite often people who pay them a ransom get scammed. Simply said, they do not receive the promised decryption tools and/or keys. In most cases data and financial loss can be avoided only by restoring files from an existing backup. Besides, even if victims uninstall/remove ransomware from the operating system, their files remain encrypted. Uninstalling it from the operating system only prevents ransomware from causing further encryptions.

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

Rooster865qqZ decrypt instructions (HOW TO BACK YOUR FILES.exe)

Rooster865qqZ is quite similar to most programs of this type, some other examples are Gesd, MMDecrypt and Righ. It is designed to prevent victims from accessing data by encrypting it and keep it that way unless a ransom is paid. The main differences between these programs usually are the price of a decryption and cryptographic algorithm (symmetric or asymmetric) that is used to encrypt data. Typically, caused encryptions can be decrypted without tools that can be purchased from cyber criminals only if ransomware is not finished, contains bugs, flaws, etc. Unfortunately, that does not happen often. For this reason it is important to always have a backup of data created and keep it on some unplugged storage device, or remote server like Cloud.

How did ransomware infect my computer?

A few most commonly used ways to proliferate ransomware (and other malicious software) is to do it by using spam campaigns, Trojans, untrustworthy file software download sources/channels, software 'cracking' tools and fakel software updaters. Cyber criminals spread malware via spam campaigns by sending emails with malciious files attached to them. Their main goal is to trick recipients into opening the attached file. Quite often they attach files such as executable files, PDF documents, archives (like RAR, ZIP), Microsoft Office documents, JavaScript files, and so on. If opened, that file installs ransomware or other high-risk malware. Trojans are malicious programs that often are designed to cause chain infections. Simply said, if installed, they download and install other malicious programs. Peer-to-peer (P2P) networks, free file hosting websites, freeware download websites, unofficial pages, third party downloaders, and other software download sources of this kind can be used to distribute malware too. Cyber criminals upload malicious files that are disguised as legitimate, harmless and hope that someone will download, and open them. By opening files downloaded from such sources people risk to infect their computers by themselves. Programs ('cracking' tools) that supposed to bypass paid activations of licensed software often install malicious programs too. Fake software updating tools cause infect systems by installing malware instead of the updates or fixes, or by exploiting bugs, flaws of outdated software that is already installed on the operating system.

Threat Summary:
Name Rooster865qqZ virus
Threat Type Ransomware, Crypto Virus, Files locker
Encrypted Files Extension .Rooster865qqZ
Ransom Demanding Message HOW TO BACK YOUR FILES.exe
Cyber Criminal Contact
Detection Names Avast (Win32:RansomX-gen [Ransom]), BitDefender (Generic.Ransom.GlobeImposter.74430B40), ESET-NOD32 (A Variant Of Win32/Filecoder.Maoloa.C), Kaspersky (Trojan.Win32.DelShad.btf), 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 Rooster865qqZ 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?

If an email is received from unknown, suspicious address, and it is irrelevant, then we strongly recommend to trust it. If it contains an attachment and/or website link, then it should not be opened. All files and programs should be downloaded from official, trustworthy websites and via direct links. Other sources like third party downloaders, questionable pages, Peer-to-Peer networks, and other similar tools should not be used to download any software. Installed software should be updated by using tools or implemented functions that are designed by official developers. The same applies to its activation, besides, it is not legal to use various software 'cracking' tools. To keep a computer safe it also recommend to regularly scan it with a reputable antivirus or anti-spyware software. If your computer is already infected with Rooster865qqZ, we recommend running a scan with Spyhunter for Windows to automatically eliminate this ransomware.

Text presented in Rooster865qqZ ransomware's po-up window ("HOW TO BACK YOUR FILES.exe"):

Your personal ID
 English ?Your files are encrypted!?


To decrypt, follow the instructions below.
To recover data you need decrypt tool.
To get the decrypt tool you should:

Send 1 crypted test image or text file or document to
In the letter include your personal ID (look at the beginning of this document). Send me this ID in your first email to me.
We will give you free test for decrypt few files (NOT VALUE) and assign the price for decryption all files.
After we send you instruction how to pay for decrypt tool and after payment you will receive a decrypt tool and instructions how to use it We can decrypt few files in quality the evidence that we have the decoder.



Do not contact other services that promise to decrypt your files, this is fraud on their part! They will buy a decoder from us, and you will pay more for his services. No one, except, will decrypt your files.


Only can decrypt your files
Do not trust anyone besides
Antivirus programs can delete this document and you can not contact us later.
Attempts to self-decrypting files will result in the loss of your data
Decoders other users are not compatible with your data, because each user's unique encryption key

Screenshot of files encrypted by Rooster865qqZ (".Rooster865qqZ" extension):

Files encrypted by Rooster865qqZ ransomware (.Rooster865qqZ extension)

Rooster865qqZ ransomware removal:

Instant automatic removal of Rooster865qqZ 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 Rooster865qqZ 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 Rooster865qqZ 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 Rooster865qqZ 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 Rooster865qqZ 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 Rooster865qqZ 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 Rooster865qqZ, 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 Rooster865qqZ 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 Rooster865qqZ 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 malware activity level today:

Medium threat activity

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

QR Code
Rooster865qqZ 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 Rooster865qqZ virus on your mobile device.
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Platform: Windows

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