Trojan.Cryptolocker Detection and Removal

Trojan.Cryptolocker also named Trojan.Gpcoder.H, CryptLocker.B, Trojan:Win32/Crilock.A, TROJ_CRILOCK.NS, Trojan.Ransomcrypt.F is an extremely devastating trojan horse that is reported to encrypt user files to extort them for money in return for a decryption key. This vicious threat may infect user PCs in several different ways, and IT security experts recommend to disconnect immediately your computer if you see any messages, saying your files have been encrypted.

Trojan.Cryptolocker Description

This particular trojan horse has many different variants, some of which are .E, .N, .F, .P, .W, .U, .R, .V. They are all very similar to each other, mainly in the sense that they encrypt user files. In one particular case of variant .P, the current objects associated with this trojan were found:

→ C:\Users\\Appdata\Local\Microsoft\delta.exe
C:\Users\\Appdata\Local\Microsoft\encryptedfile.txt
C:\Users\\Appdata\Local\Microsoft\pacman.exe
C:\Users\AppData\Local\Temp\winstore.log
HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Run

The ‘PacMan.exe’ file is probably the one that was used to initiate the infection. It is most likely sent directly to the user via email, messengers or straight inserted with a USB stick on the computer. It may also feature a crypter patch with countermeasures against detection of the app by some antivirus programs. Once opened, pacman.exe may have scripts (pre-programmed actions) that move it after its opening and hide it from the user. One moment you click on it and in the other – poof and it’s gone. More so some of the actions it is programmed to do is create other files that may be scheduled to scan the computer every hour for new files and encrypt them. This is why it is recommended to remove this program from your computer by using an advanced anti-malware program fast.

How Did I Become Infected?

There are several means of distribution for this Trojan. Some of them are mainly connected with the direct execution of the file by another individual on the PC. Another method is a redirect by an adware PUP (Potentially Unwanted Program) on your computer. Such PUP programs are notorious for bringing up annoying pop-ups, with flashy messages along with pictures, saying ‘Play Now’, ‘Your computer has been infected’ or any other scamming attempts to make you click on their links. There was one particular redirect that said ‘Your Java needs an update’ and with only one ‘Ok’ button on it, which after clicked on, begun downloading malware on the computer.

Either way experts advise if you see this threat to disconnect immediately your computer from the web and download an anti-malware program from a safe device to install it on the affected PC.

How To Remove Trojan.Cryptolocker?

There are many methods for the removal of this Trojan, but an expert advice is to do it in a safe offline mode or to boot live OS USB or CD. It is a standalone operating system that does not allow Trojan.Lockscreen to operate and isolates the threat. Regarding the files, it is recommended to do a backup first. Always use an external memory carrier and always make more than one copy of your important files in case something happens. For best results, you should follow the removal manual below and download a particular anti-malware program that will scan and remove anything out of the ordinary.

Spy Hunter scanner will only detect the threat. If you want the threat to be automatically removed, you need to purchase the full version of the anti-malware tool.Find Out More About SpyHunter Anti-Malware Tool / How to Uninstall SpyHunter

Trojan.Cryptolocker – How To Protect Your Files?

In case you have seen ransomware attacks, you might want to back up your data. To perform this action, you should guide yourself by the after mentioned manual.

Security engineers recommend that you back up your files immediately, preferably on an external memory carrier in order to be able to restore them. In order to protect yourself from Trojan.Cryptolocker (For Windows Users) please follow these simple instructions:
For Windows 7 and earlier:
1-Click on Windows Start Menu

2-Type Backup And Restore
3-Open it and click on Set Up Backup

4-A window will appear asking you where to set up backup. You should have a flash drive or an external hard drive. Mark it by clicking on it with your mouse then click on Next.

5-On the next window, the system will ask you what do you want to backup. Choose the ‘Let Me Choose’ option and then click on Next.

6-Click on ‘Save settings and run backup’ on the next window in order to protect your files from possible attacks by Trojan.Cryptolocker.

For Windows 8, 8.1 and 10:
1-Press Windows button + R

2-In the window type ‘filehistory’ and press Enter

3-A File History window will appear. Click on ‘Configure file history settings’

4-The configuration menu for File History will appear. Click on ‘Turn On’. After its on, click on Select Drive in order to select the backup drive. It is recommended to choose an external HDD, SSD or a USB stick whose memory capacity is corresponding to the size of the files you want to backup.

5-Select the drive then click on ‘Ok’ in order to set up file backup and protect yourself from Trojan.Cryptolocker.
Enabling Windows Defense Feature:
1- Press Windows button + R keys.

2- A run windows should appear. In it type ‘sysdm.cpl’ and then click on Run.

3- A System Properties windows should appear. In it choose System Protection.

5- Click on Turn on system protection and select the size on the hard disk you want to utilize for system protection.
6- Click on Ok and you should see an indication in Protection settings that the protection from Trojan.Cryptolocker is on.

Restoring a file via Windows Defense feature:
1-Right-click on the encrypted file, then choose Properties.

2-Click on the Previous Versions tab and then mark the last version of the file.

3-Click on Apply and Ok and the file encrypted by Trojan.Cryptolocker

Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

More Posts

---

Attention! SensorsTechForum strongly recommends that all malware victims should look for assistance only by reputable sources. Many guides out there claim to offer free recovery and decryption for files encrypted by ransomware viruses. Be advised that some of them may only be after your money.

As a site that has been dedicated to providing free removal instructions for ransomware and malware since 2014, SensorsTechForum’s recommendation is to only pay attention to trustworthy sources.

How to recognize trustworthy sources:

• Always check "About Us" web page.
• Profile of the content creator.
• Make sure that real people are behind the site and not fake names and profiles.
• Verify Facebook, LinkedIn and Twitter personal profiles.

---

OFFER

REMOVE IT NOW (PC)

with Anti-Malware

We recommend you to download SpyHunter and run free scan to remove all virus files on your PC. This saves you hours of time and effort compared to doing the removal yourself.

SpyHunter 5 free remover allows you, subject to a 48-hour waiting period, one remediation and removal for results found. Read EULA and Privacy Policy

• Guide 1: How to Remove Trojan.Cryptolocker from Windows.
• Guide 2: Get rid of Trojan.Cryptolocker from Mac OS X.

Windows Mac OS X

How to Remove Trojan.Cryptolocker from Windows.

---

Step 1: Boot Your PC In Safe Mode to isolate and remove Trojan.Cryptolocker

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!

We Recommend To Scan Your PC with SpyHunter

Keep in mind, that SpyHunter’s scanner is only for malware detection. If SpyHunter detects malware on your PC, you will need to purchase SpyHunter's malware removal tool to remove the malware threats. Read our SpyHunter 5 review. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria

---

1. Hold Windows key() + R

---

2. The "Run" Window will appear. In it, type "msconfig" and click OK.

---

3. Go to the "Boot" tab. There select "Safe Boot" and then click "Apply" and "OK". Tip: Make sure to reverse those changes by unticking Safe Boot after that, because your system will always boot in Safe Boot from now on.

---

4. When prompted, click on "Restart" to go into Safe Mode.

---

5. You can recognise Safe Mode by the words written on the corners of your screen.

---

Step 2: Uninstall Trojan.Cryptolocker and related software from Windows

Here is a method in few easy steps that should be able to uninstall most programs. No matter if you are using Windows 10, 8, 7, Vista or XP, those steps will get the job done. Dragging the program or its folder to the recycle bin can be a very bad decision. If you do that, bits and pieces of the program are left behind, and that can lead to unstable work of your PC, errors with the file type associations and other unpleasant activities. The proper way to get a program off your computer is to Uninstall it. To do that:

---

1. Hold the Windows Logo Button and "R" on your keyboard. A Pop-up window will appear.

---

2. In the field type in "appwiz.cpl" and press ENTER.

---

3. This will open a window with all the programs installed on the PC. Select the program that you want to remove, and press "Uninstall" Follow the instructions above and you will successfully uninstall most programs.

---

Step 3: Clean any registries, created by Trojan.Cryptolocker on your computer.

The usually targeted registries of Windows machines are the following:

• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
• HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunOnce
• HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce

You can access them by opening the Windows registry editor and deleting any values, created by Trojan.Cryptolocker there. This can happen by following the steps underneath:

1. Open the Run Window again, type "regedit" and click OK.

---

2. When you open it, you can freely navigate to the Run and RunOnce keys, whose locations are shown above.

---

3. You can remove the value of the virus by right-clicking on it and removing it. Tip: To find a virus-created value, you can right-click on it and click "Modify" to see which file it is set to run. If this is the virus file location, remove the value.

IMPORTANT!
Before starting "Step 4", please boot back into Normal mode, in case you are currently in Safe Mode.
This will enable you to install and use SpyHunter 5 successfully.

Step 4: Scan for Trojan.Cryptolocker with SpyHunter Anti-Malware Tool

1. Click on the "Download" button to proceed to SpyHunter's download page.

Download

Malware Removal Tool

---

It is recommended to run a scan before purchasing the full version of the software to make sure that the current version of the malware can be detected by SpyHunter. Click on the corresponding links to check SpyHunter's EULA, Privacy Policy and Threat Assessment Criteria.

---

2. After you have installed SpyHunter, wait for it to update automatically.

---

3. After the update process has finished, click on the 'Malware/PC Scan' tab. A new window will appear. Click on 'Start Scan'.

---

4. After SpyHunter has finished scanning your PC for any files of the associated threat and found them, you can try to get them removed automatically and permanently by clicking on the 'Next' button.

If any threats have been removed, it is highly recommended to restart your PC.

Step 5 (Optional): Try to Restore Files Encrypted by Trojan.Cryptolocker.

Ransomware infections and Trojan.Cryptolocker aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

EaseUS Data Recovery Software

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

Windows Mac OS X

Get rid of Trojan.Cryptolocker from Mac OS X.

---

Step 1: Uninstall Trojan.Cryptolocker and remove related files and objects

OFFER

Manual Removal Usually Takes Time and You Risk Damaging Your Files If Not Careful!

We Recommend To Scan Your Mac with SpyHunter for Mac

Keep in mind, that SpyHunter for Mac needs to purchased to remove the malware threats. Click on the corresponding links to check SpyHunter’s EULA and Privacy Policy

1. Hit the ⇧+⌘+U keys to open Utilities. Another way is to click on “Go” and then click “Utilities”, like the image below shows:

---

2. Find Activity Monitor and double-click it:

---

3. In the Activity Monitor look for any suspicious processes, belonging or related to Trojan.Cryptolocker:

Tip: To quit a process completely, choose the “Force Quit” option.

---

4. Click on the "Go" button again, but this time select Applications. Another way is with the ⇧+⌘+A buttons.

---

5. In the Applications menu, look for any suspicious app or an app with a name, similar or identical to Trojan.Cryptolocker. If you find it, right-click on the app and select “Move to Trash”.

---

6: Select Accounts, after which click on the Login Items preference. Your Mac will then show you a list of items that start automatically when you log in. Look for any suspicious apps identical or similar to Trojan.Cryptolocker. Check the app you want to stop from running automatically and then select on the Minus (“-“) icon to hide it.

---

7: Remove any left-over files that might be related to this threat manually by following the sub-steps below:

• Go to Finder.
• In the search bar type the name of the app that you want to remove.
• Above the search bar change the two drop down menus to “System Files” and “Are Included” so that you can see all of the files associated with the application you want to remove. Bear in mind that some of the files may not be related to the app so be very careful which files you delete.
• If all of the files are related, hold the ⌘+A buttons to select them and then drive them to “Trash”.

In case you cannot remove Trojan.Cryptolocker via Step 1 above:

In case you cannot find the virus files and objects in your Applications or other places we have shown above, you can manually look for them in the Libraries of your Mac. But before doing this, please read the disclaimer below:

Disclaimer! If you are about to tamper with Library files on Mac, be sure to know the name of the virus file, because if you delete the wrong file, it may cause irreversible damage to your MacOS. Continue on your own responsibility!

1: Click on "Go" and Then "Go to Folder" as shown underneath:

2: Type in "/Library/LauchAgents/" and click Ok:

3: Delete all of the virus files that have similar or the same name as Trojan.Cryptolocker. If you believe there is no such file, do not delete anything.

You can repeat the same procedure with the following other Library directories:

→ ~/Library/LaunchAgents
/Library/LaunchDaemons

Tip: ~ is there on purpose, because it leads to more LaunchAgents.

---

Click the button below below to download SpyHunter for Mac and scan for Trojan.Cryptolocker:

Download

SpyHunter for Mac

---

---

Step 3 (Optional): Try to Restore Files Encrypted by Trojan.Cryptolocker.

Ransomware infections and Trojan.Cryptolocker aim to encrypt your files using an encryption algorithm which may be very difficult to decrypt. This is why we have suggested a data recovery method that may help you go around direct decryption and try to restore your files. Bear in mind that this method may not be 100% effective but may also help you a little or a lot in different situations.

1. Download the reccomended Data Recovery software by clicking on the link underneath:

EaseUS Data Recovery Software

Simply click on the link and on the website menus on top, choose Data Recovery - Data Recovery Wizard for Windows or Mac (depending on your OS), and then download and run the tool.

---

Trojan.Cryptolocker FAQ

What is Trojan.Cryptolocker ransomware and how does it work?

Trojan.Cryptolocker is a ransomware infection - the malicious software that enters your computer silently and blocks either access to the computer itself or encrypt your files.

Many ransomware viruses use sophisticated encryption algorithm how to make your files inaccessible. The goal of ransomware infections is to demand that you pay a ransom payment to get access to your files back.

How does Trojan.Cryptolocker ransomware infect my computer?

Via several ways.Trojan.Cryptolocker Ransomware infects computers by being sent via phishing e-mails, containing virus attachment.

This attachment is usually masked as an important document, like an invoice, bank document or even a plane ticket and it looks very convincing to users.

After you download and execute this attachment, a drive-by download occurs and your computer is infected with the ransomware virus.

Another way, you may become a victim of Trojan.Cryptolocker is if you download a fake installer, crack or patch from a low reputation website or if you click on a virus link. Many users report getting a ransomware infection by downloading torrents.

How to open .Trojan.Cryptolocker files?

You can't. At this point the .Trojan.Cryptolocker files are encrypted. You can only open them once they are decrypted.

Decryptor did not decrypt my data. What now?

Do not panic and backup the files. If a decryptor did not decrypt your .Trojan.Cryptolocker files successfully, then do not despair, because this virus is still new.

One way to restore files, encrypted by Trojan.Cryptolocker ransomware is to use a decryptor for it. But since it's a new virus, advised that the decryption keys for it may not be out yet and available to the public. We will update this article and keep you posted as soon as this decryptor is released.

How Do I restore ".Trojan.Cryptolocker" files (Other Methods)?

Yes, sometimes files can be restored. We have suggested several file recovery methods that could work if you want to restore .Trojan.Cryptolocker files.

These methods are in no way 100% guarantee that you will be able to get your files back. But if you have a backup, your chances of success are much greater.

How do I get rid of Trojan.Cryptolocker ransomware virus?

The safest way and the most efficient one for the removal of this ransomware infection is the use a professional anti malware software. It will scan for and locate Trojan.Cryptolocker ransomware and then remove it without causing any additional harm to your important .Trojan.Cryptolocker files.

Also, keep in mind that viruses like Trojan.Cryptolocker ransomware also install Trojans and keyloggers that can steal your passwords and accounts. Scanning your computer with an anti-malware software will make sure that all of these virus components are removed and your computer is protected in the future.

What to Do If nothing works?

There is still a lot you can do. If none of the above methods seem to work for you, then try these methods:

• Try to find a safe computer from where you can can login on your own line accounts like One Drive, iDrive, Google Drive and so on.
• Try to contact your friends, relatives and other people so that they can check if they have some of your important photos or documents just in case you sent them.
• Also, check if some of the files that were encrypted it can be re-downloaded from the web.
• Another clever way to get back some of your files is to find another old computer, a flash drive or even a CD or a DVD where you may have saved your older documents. You might be surprised what will turn up.
• You can also go to your email account to check if you can send any attachments to other people. Usually what is sent the email is saved on your account and you can re-download it. But most importantly, make sure that this is done from a safe computer and make sure to remove the virus first.

More tips you can find on our forums, where you can also asks any questions about your ransomware problem.