Sunday, March 26, 2017

Happydayzz ransomware removal instructions

What is Happydayzz?

Happydayzz is a ransomware-type virus relating to Purge malware. Once infiltrated, Happydayzz encrypts various files stored on the system. During this process, it renames encrypted files using the "[].[22_random_characters].happydayzz" pattern. For example, "sample.jpg" might be renamed to "[].GlM8-AiM04-Lq6mHG1i0L0.happydayzz". Following successful encryption, Happydayzz creates an HTA file ("How To Recover Encrypted Files.hta"), placing it in each folder containing encrypted files.
The HTA file contains a message informing users of the encryption. To restore these files, victims are encouraged to pay a ransom. To submit payment, they must contact Happydayzz's developers via an email address ("") provided. It is also stated that victims are permitted to attach two selected files (max total size of 5 MB), which are then decrypted and returned. This, supposedly to guarantee that the files can be restored. It is currently unknown whether Happydayzz uses symmetric or asymmetric encryption algorithm, however, decryption without a unique key is impossible. Research shows that criminals store this key on a remote server and victims are encouraged to pay to receive it. The cost is currently unconfirmed and often depends on how fast the victim decides to pay, however, cyber criminals usually demand the equivalent of between $500 - 1500 in Bitcoins. Despite these threats and demands, never attempt to contact these people or pay any ransom. Cyber criminals often ignore victims, once payments are submitted. Paying does not guarantee that your files will ever be decrypted and there is a high probability that you will be scammed. Unfortunately, there are no tools capable of decrypting files compromised by Happydayzz and you can only restore files/system from a backup.
Screenshot of a message encouraging users to pay a ransom to decrypt their compromised data:
Happydayzz decrypt instructions
The Internet is full of ransomware-type viruses virtually identical to Happydayzz. The list of examples includes (but is not limited to) RevengeVortexRozzaLocker, and VenusLocker. As with Happydayzz, these viruses also encrypt files and make ransom demands. The only major differences are size of ransom and type of encryption algorithm (symmetric or asymmetric) used. Distribution methods are also identical. Ransomware-type viruses are often distributed using spam emails (malicious attachments), third party download sources (torrents, free file hosting websites, freeware download websites, etc.), fake software update tools, and trojans. Therefore, never open files received from suspicious/unrecognizable emails or download software/files from unofficial sources. Furthermore, use a legitimate anti-virus/anti-spyware suite and keep your installed applications up-to-date. Bear in mind, however, that criminals employ fake updaters to proliferate various malware. Therefore, never use third party tools to update installed applications. The key to computer safety is caution.
Screenshot of files encrypted by Happydayzz ("[].[22_random_characters].happydayzz" renaming pattern):
Files encrypted by Happydayzz

Happydayzz ransomware removal:

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 Happydayzz 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 need assistance removing happydayzz , give us a call 24/7:
By downloading any software listed on this website you agree to our Privacy Policy and Terms of Use. SpyHunter’s free scanner is for malware detection. To remove the detected infections you will need to purchase a full version of this product. More information on SpyHunter. If you wish to uninstall SpyHunter follow these instructions. All the products we recommend were carefully tested and approved by our technicians as being one of the most effective solutions for removing this threat.
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 Happydayzz 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 Happydayzz 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 Happydayzz 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 Happydayzz, 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 Happydayzz 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 Happydayzz ransomware:

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