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Trojan:JS/Miuref.A Removal, Get Rid of Trojan Virus on Windows

Overview of Trojan:JS/Miuref.A

Trojan:JS/Miuref.A is considered as a specific JavaScript security infection, primarily assaulting individuals using Windows operating system (OS). It is usually added into genuine websites that have been compromised by malware distributors, some examples of which are Yahoo, Google or Twitter. When Internet users visit or are unwillingly rerouted to those hijacked websites, their PCs will be get infected with Trojan:JS/Miuref.A infection surreptitiously. More recently, in order to propagate Trojan:JS/Miuref.A virus widely, attackers have been utilizing SEP poisoning techniques through creating infected URLs to the top of search engine results about recent news events or other hot issues. Upon being clicked, Trojan:JS/Miuref.A threat will make use of found security vulnerabilities so as to drop and install its components on the computer that it infects. Another common-used method to diffuse this Trojan infection is the SPAM email carrying malignant sponsored links or other attachments. Internet users may also have the possibility to get infected with Trojan:JS/Miuref.A by downloading some unreliable applications on Internet.

After its installation, Trojan:JS/Miuref.A virus will typically insert malevolent files in system for the sake of making modifications to the Windows Registry. As a result, Trojan:JS/Miuref.A could be loaded up and execute automatically on every Windows boot on account of the change on NTFS boot sector’s IPL (Initial Program Loader). At the same time, the infection may consume a large amount of memory space and then result in high CPU utilization in order to decrease the overall performance of Windows. Apart from these basic symptoms, Trojan:JS/Miuref.A threat may carry out numerous payloads on affected computer, which could be used to drop and install additional malware, including worm (eg. Worm/autorun.aa threat), rogue, keylogger, so that to make further damage in compromised system. The worse thing is, Trojan:JS/Miuref.A infection may acts as a backdoor, contacting a distant Comman-and -Control (C&C) server operated by malware developers. In other words, Trojan:JS/Miuref.A may even offer unauthorized access for attackers, allowing them to access affected Windows freely. This may lead to unimaginable damage or loss to victim’s computer as well as privacy.

Note: Manual removal of Trojan:JS/Miuref.A virus requires certain PC tech knowledge. If you are not familiar with the operation, you may start a live chat with VilmaTech Certified 24/7 online expert here to resolve your problem safely and properly.

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Auto Removal for Trojan:JS/Miuref.A Virus

Major PC users notice the presence of Trojan:JS/Miuref.A after having a full/quick scan in their antivirus software applications. It seems that Trojan:JS/Miuref.A has sophisticated experience on dealing with the auto removal by antivirus or other security tool. This type of Trojan infection may come back over and over again even after the first auto uninstallation. Tricky as Trojan:JS/Miuref.A  virus is, it will always implant and hide its components deeply in system as long as belong installed on a targeted computer. This way it will protect itself from being removed or detected effectively by some virus removers. Thereupon to get rid of Trojan:JS/Miuref.A completely, it is strongly recommended to adopt the almighty manual approach, which has the capability to clean up all its related codes, dll.files, and registry files from computer.

Manual Removal for Trojan:JS/Miuref.A Virus

1. Show hidden files related to Trojan:JS/Miuref.A.

Once being installed, Trojan:JS/Miuref.A virus will typically insert and hide its codes and files deeply in system in order to avoid removal. So before removing Trojan:JS/Miuref.A virus from computer, you need to show all hidden files related to Trojan:JS/Miuref.A so as to remove all its components completely. Here is how:

For Windows XP, 7 and Vista:

  • Select Start menu.
  • Choose Control Panel.
  • Go to Appearance and Personalization.


  • Choose Folder Options.
  • Click on the View tab.
  • Select Show hidden files and folders, uncheck Hide protected operating system files (Recommended).


  • Apply OK.

For Windows 8:

  • Restart infected PC.
  • On the desktop, click  on the mini start menu.

win8_hidden files1

  • Choose Control Panel.
  • Click on the Folder Options link.

win8_hidden files2

  • Click the View tab.

win8_hidden files3

  • Click on the Hidden files and folders icon and then click the Show hidden files, folders, and drives option selector.

win8_hidden files4

  • Apply OK.

2. End up all processes of Trojan:JS/Miuref.A in Task Manager.


3. Go to local disk, remove all the files of Trojan:JS/Miuref.A.


4. In Registry Editor, clean up all registry entries related to Trojan:JS/Miuref.A.


HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “%Windir%\system\winlogon.exe”
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run “%Windir%\system\lsass.exe”

Video Guide on How to Safely Backup Windows Registry Entries

In Conclusion

Trojan:JS/Miuref.A is a destructive Trojan infection designed by cyber criminals to make hazards on the computer that it infects and gain from victims. It can often sneak into a targeted machine without any permission or knowledge. According to recent security report, Trojan:JS/Miuref.A virus may be distributed by malicious websites, infected downloads on Internet or spam emails carrying malicious attachments. Upon its installation, Trojan:JS/Miuref.A virus will immediately insert its malevolent codes and files in system in order to make modification in Windows registry. Thereupon Trojan:JS/Miuref.A could be loaded up automatically on every Windows boot. While running in the background, this type of Trojan infection may slow down the performance of system significantly via taking up large amounts of system resources. It may also drop and install additional threats on compromised machine to do further harm using all possible found security vulnerabilities. PC users worried about Trojan:JS/Miuref.A a lot because it may even open a backdoor for remote hackers, allowing them to access compromised machine without any authorization. It is certain that Trojan:JS/Miuref.A should be removed timely once being informed of its existence.

Attention: Manual removal is a high-risk process that is only suggested for advanced PC users. Any single mistake may lead to worse results such as data loss or even computer crash. If you cannot handle the operation alone, you may ask help from VilmaTech Certified 24/7 online expert here to help you fix your issue completely in a short time.

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