Friday, January 2, 2015

Guide to Manually Remove TrojanDownloader:Win32/Nistio.A


Have you found TrojanDownloader:Win32/Nistio.A on your computer but still cannot completely remove it by now? If so, you have come to the right place. The removal guide in this post will tell you how to easily and completely remove TrojanDownloader:Win32/Nistio.A from your computer for good.

Definition

TrojanDownloader:Win32/Nistio.A is a harmful Trojan horse that can stealthily download other malicious programs or files onto the targeted computer. This Trojan horse is used by the rogue hackers to gain access to the infected computer to steal the valuable data and private information of the user.

Harmful Activities Performed by the Trojan Horse

If this Trojan horse infects your computer, it will hide itself in the background of your system and perform a range of harmful activities which have been listed as follows:

It slows down your computer performance by consuming a lot of precious resources.
It causes occasional system crash or freezing by deleting important system files randomly.
It further impairs your system by downloading a lot of threats like virus, worm, spyware and adware onto your computer.
It helps the remote hackers to visit your computer without your knowledge by opening a backdoor.
It gathers your confidential information for the hackers by using a key logger.

Main Causes of the Infection

The hackers tend to insert TrojanDownloader:Win32/Nistio.A into some insecure websites, free software or email attachments so as to achieve the goal of letting you download such Trojan horse without any awareness. Your computer gets infected with the malicious Trojan horse usually because you have the following online activities:

Visit unsafe websites like phishing sites or pornographic websites.
Download freeware, shareware or other free media players from questionable websites.
Click on suspicious links which will take you to the infected websites.
Download spam email attachments that are bundled with such Trojan horse.

Note: If you are not experienced in computer, it’s suggested that you backup your registry as well as important data before manually removing the Trojan horse. If you are unsure how to perform the manual removal and afraid of making any mistakes during the process, it is highly recommended that you download and run a professional removal tool to easily and completely clean up the threat.

Guide to Manually Remove TrojanDownloader:Win32/Nistio.A

Note: Since the manual removal is a complicated task which involves the deletion of files and registry entries, we sincerely suggest that you back up the Windows registry and important data and before you start to the manual removal. Then, follow the steps to remove the Trojan horse.

1. Restart your infected computer.
2. As it starts up, you should tap the key F8 several times until the Windows Advanced Options Menu appears on the screen.
3. Highlight the “Safe Mode with Networking” option by using the arrow keys.
4. Press Enter to proceed.
5. Press keys CTRL+ALT+DEL together to open the Windows Task Manager.
6. Go to “Processes” tab, search for and stop the processes related to TrojanDownloader:Win32/Nistio.A.
7. Locate the files listed below and delete all of them from your computer.

%AppData%\Bifrost\server.exe
%ProgramFiles%\random.exe
C:\WINDOWS\trlrokgq
C:\Documents and Settings\Administrator\Local Settings\Temp\dinotifyb.exe
C:\Documents and Settings\Administrator\Local Settings\nsg8.tmp\execpri.dll
C:\Documents and Settings\Administrator\Local Settings\Temp\nsg8.tmp\inetc.dll

8. Click on the Start menu and go to Run.
9. Type “regedit” into the dialog box and press Enter. This will open the Registry Editor.
10. In the Registry Editor, find out and remove the registry entries associated with the Trojan horse.

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Current Version\Run\random.exe”
HKEY_CURRENT_USER\AppEvents\Schemes\Apps\Explorer\Navigating
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
HKEY_CURRENT_USER\Software\Microsoft\CurrentVersion\Run\”MSN” = “%Temp%\34542.exe”

12. Reboot your computer back to the normal mode to check whether the Trojan horse has been completely removed from your computer.

Attention: The manual removal is a method recommended only for those have sufficient computer knowledge and skills, since there are some malicious files and registry entries to be deleted completely. If you are a novice user, you should not attempt it. If any important system files are accidentally deleted, it may lead to some unwanted system damage. Therefore, we highly recommend downloading and using SpyHunter, which is much easier than the manual removal. This powerful removal tool will thoroughly detect the threats on your computer and remove them in no time. Click and download this powerful malware removal tool right now!

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