Trojan:Win64/Sirefef.D

Trojan:Win64/Sirefef.D Description

Trojan:Win64/Sirefef.D is a dropper Trojan that installs rootkits and rogue software like fake security programs and fake defraggers. Like other Trojans in the Trojan:Win64/Sirefef family, Trojan:Win64/Sirefef.D is designed to attack 64-bit Windows computers; 32-bit and Windows systems aren’t threatened by Trojan:Win64/Sirefef.D, although they may be attacked by other Sirefef Trojans. SpywareRemove.com malware researchers note that removing Trojan:Win64/Sirefef.D can be difficult if not performed by adequately-powerful anti-malware products, since rootkits and other PC threats that can be installed by Trojan:Win64/Sirefef.D will take actions to shut down your PC security and anti-malware features.

Reasons to Keep Trojan:Win64/Sirefef.D at a Safe Distance from Your Hard Drive

As a Trojan, Trojan:Win64/Sirefef.D can be installed by several methods, but will always try to conceal its presence in some way. Trojan:Win64/Sirefef.D may be installed by drive-by-download scripts from hostile websites, be included in an installation package for an unrelated program or even be installed by another type of Trojan. Trojan:Win64/Sirefef.D itself is primarily-dedicated to installing a rootkit that launches automatically and hides its activities inside of normal Windows processes. You may be able to detect this activity by noting excessive RAM usage in Task Manager.

As a relative of both Trojan:Win64/Sirefef.E and Trojan:Win64/Sirefef.C, Trojan:Win64/Sirefef.D is also associated with rogue security products and other types of fake software.

You may notice fake Microsoft Security Essentials pop-ups when Trojan:Win64/Sirefef.D is installing these programs, or other symptoms, including:

Fake system alerts and errors that announce that Windows is severely-damaged or that an essential program has been infected by a keylogger or other type of high-level PC threat.
Requests by unusual programs to purchase a registration or activation key.
Web browser hijacks that redirect your browser to a site that promotes malicious software.

Why You Don’t Always Have to Worry About Trojan:Win64/Sirefef.D

Depending on its payload, Trojan:Win64/Sirefef.D’s attacks may or may not be readily-visible to casual inspection. However, SpywareRemove.com malware experts always suggest that you use a competent anti-malware scanner to get rid of a Trojan:Win64/Sirefef.D infection and related PC threats, since anything less than this may allow Trojan:Win64/Sirefef.D or an even more-harmful infection to conduct attacks without being noticed. In most cases, appropriate methods of removing Trojan:Win64/Sirefef.D will insure that your PC doesn’t suffer from any lingering harm after the fact.

As even brighter news than the above, some cases of Trojan:Win64/Sirefef.D detections can also be false positives. False positives are inaccurate Trojan:Win64/Sirefef.D alerts that cause no harm to your computer and can be ignored. In most situations, keeping your security software patched for the latest PC threat definitions will stop the appearance of Trojan:Win64/Sirefef.D false alerts. If your particular software fails to fix this Trojan:Win64/Sirefef.D warning quickly, in the meantime, you can set the program to ignore the supposedly ‘infected’ file without suffering any problems.

Trojan:Win64/Sirefef.D Automatic Detection Tool (Recommended)

Is your PC infected with Trojan:Win64/Sirefef.D? To safely & quickly detect Trojan:Win64/Sirefef.D, we highly recommend you run the malware scanner listed below.

Download SpyHunter's* Malware Scanner to detect Trojan:Win64/Sirefef.D What happens if Trojan:Win64/Sirefef.D does not let you open SpyHunter or blocks the Internet?

Technical Details

File System Modifications

Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.

The following files were created in the system:

#	File Name	Detection Count
1	file.dll	571
2	file.exe	564
3	SYDLWB1083-1.zip	541
4	%AllUsersProfile%\Application Data\.dll	N/A
5	%AllUsersProfile%\Application Data\.exe(looks like Trojan:win64/sirefef.D)	N/A

Registry Modifications

Tutorial: To edit and delete registry entries manually, read the tutorial on how to remove malicious registry entries.

Tip & Warning: Editing and removing the wrong registry keys can severely damage your PC, so remember to backup your Windows Registry! To optimize your Windows Registry and speed up your PC, download RegHunter's registry cleaner.

The following newly produced Registry Values are:
HKEY..\..\..\..{Subkeys}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run ".exe"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run "Trojan:win64/sirefef.D"HKEY_CURRENT_USER\Software\Wow6432NodeHKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run "Trojan:win64/sirefef.D"

Posted: November 7, 2011 | By SpywareRemove