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Get rid of Win32:sirefef-aoo [trj] in spite of its stealth aimed at escaping antivirus

Win32:Sirefef-aoo [trj] is a piece of malware protected by a set of routines preventing its identification by common antiviral detection routine.
The rogue remains unnoticed by your current antivirus, but applies effort continuously to load other parasites onto affected machine. To further aggravate the removal of Win32:sirefef-aoo [trj], its developers have provided for an aggressive approach toward already installed security devices on affected PC, in particular, the rogue has been observed to disable firewall; the latter example rather illustrates tricks aimed at helping the malware in executing its payload of a trojan-dropper, than a stealth to prevent extermination of its components.
In spite of all the tricks the rogue undertakes to survive, free scanner available here will remove Win32:sirefef-aoo [trj] and other malicious residents of your PC, including the infection loaded thanks to the effort of the variant of Sirifef malware under review.

Win32:Sirefef-aoo [trj] behaviour and details:


  • Win32:Sirefef-aoo [trj] may seriously slow your computer;
  • Win32:Sirefef-aoo [trj] may be difficult to remove manually;
  • Win32:Sirefef-aoo [trj] may generate other fake alerts;
  • Win32:Sirefef-aoo [trj] is the consequence of other malware infections;
  • We recommend to remove Win32:Sirefef-aoo [trj] automatically.

Automated removal:

It is critically important to remove Win32:Sirefef-aoo [trj], yet there might be a number of other threats to deal with. Without a doubt, presence of one infection on your PC increases the odds of having more than one threat, other things being equal, for every infection definitely weakens computer system.

The tool to get rid of Win32:Sirefef-aoo [trj] takes the above consideration into account as it detects the infections through entire hard and removable memory submitted in order that it can delete the specified parasites. It is a multi-purpose solution to satisfy the variety of your computer protection needs. In the meantime, its ability to perform the extermination of rogue in question has been tested specifically, and empirical evidence available that it does cope with the task.

Manual removal instructions:

Incorrect or incomplete deletion happens when one or more constituents of deleted rogue are omitted and/or harmless files and registry values are abolished instead. Such improper act rather harms than cures. If you stand for the manual procedure and is about to apply it, please completely delete the rogue in a strict accordance with the list below.

Remove Win32:Sirefef-aoo [trj] files:

%System%\drivers\[RANDOM CHARACTERS].sys


C:\WINDOWS\system32\[random name].dll

Remove Win32:Sirefef-aoo [trj] registry entries:

ThreadingModel = “Apartment”HKEY_LOCAL_MACHINESOFTWAREClassesCLSID{89721a77-988b-43cb-81e4-89c101e44f15}InprocServer32

Related removal guides:

  1. Get rid of Win32:Sirefef-AHF [Trj] with care – safe cleanup for white-listed area
  2. Get rid of Win32:Downloader-PRT [Trj] and the malicious content it brings
  3. Get rid of Win32:Ransom-WH[Trj] to stop/prevent cyber blackmailing
  4. Get rid of Trojan:Win32/Sirefef.P as is or as a part of larger infection
  5. Get rid of Win32/Sirefef.CH browser oppressor and the peril of drawing your PC into botnet

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