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Danger level 7
Type: Trojans
Common infection symptoms:
  • Blocks internet connection
  • Connects to the internet without permission
  • Installs itself without permissions
  • Slow Computer
  • Slow internet connection
  • System crashes


Another shockingly latent Windows infection has been spotted, and the new Rootkit.Tmphider Trojan can not only paralyze your personal system, but can also pick up on your personal information! This Windows Trojan is no ordinary infection, as it spreads via removable drives, and its malignant files cannot be detected by low-level security applications in any devices. The two infection’ files that get injected during the Trojan’s activity are mrxcls.sys and mrxnet.sys, which work based on the rootkit method and are effectively hidden from any detection and removal. What is also unordinary about these system drive files, is that they use Realtek Semiconductor Corp. name in the digital signature, which is created that way to make Windows users, who detect these Rootkit.Tmphider .sys files, believe that they are harmless.

It is unfortunate, but once Rootkit.Tmphider files mrxcls.sys and mrxnet.sys invade a system, a code is injected into regular Windows processes, which hides the files and their activities from detection of any existing security tools. These infectious files can remove privileges to essential Windows tools, download additional malware, connect to the remote servers via unauthorized Internet connections, and even can compromise overall system’s performance. If this were done, your computer could become nearly inoperable, or even taken over by other horrendous malware. What is more, Rootkit.Tmphider could potentially be highly dangerous to your personal safety, which could be threatened by keyloggers, BHOs (browser helper objects), tracking cookies, worms, and other similar applications, capable to record and steal such sensitive information as passwords, user names, keyboard inputs, browsing results, etc. Such data could assist in further Rootkit.Tmphider cyber criminals’ attacks

Without a doubt, the Trojan must be removed, and it should be done without any hesitations, as it is only a matter of time, when the Trojan invites more malware, which could cause irreparable harm. Manual Rootkit.Tmphider removal should be out of the question to inexperienced Windows user, but is not advised to expert users as well, as this latent infection is cunning enough to trick even well experienced malware experts. If some Trojan files were missed, the infection could regenerate, and if Windows system files were mistakenly deleted, malicious program could gain even more control over your system. The most effective way to delete Rootkit.Tmphider is using up-to-date security tools, which would have the right attributes to remove even such latent files as Rootkit.Tmphider’s mrxcls.sys and mrxnet.sys.

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How to manually remove Rootkit.TmpHider

Files associated with Rootkit.TmpHider infection:


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