WinDir.lsass

Overview

A common technique that spyware, adwares, viruses, keyloggers etc use to hide from users is to drop files on the system that use the same name as a legitimate file but in a different folder. WinDir.lsass is a warning that there is a file named lsass.exe located in %WinDir% on your system. The legitimate lsass.exe file is located in %SystemDir%. You might want to analyse %WinDir%\lsass.exe to verify it is something that you really want on your system. Do not delete %WinDir%\lsass.exe unless you are 100% sure it is a threats.

Note: %WinDir% is a variable (?). By default, this is C:\Windows (Windows 95/98/Me/XP) or C:\WINNT (Windows NT/2000).
Note: %SystemDir% is a variable (?). By default, this is C:\Windows\System (Windows 95/98/Me), C:\WINNT\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).

The following threats drops lsass.exe in %WinDir%:
PE_WINDANG.B, Troj/VB-EJ, W32/Windang.worm, TROJ_ALCOP.A, Troj/Backdoor.Sypofox.A, W32/Floppy-B, and many more.

Files

lsass.exe

If you have any of the files related to WinDir.lsass on your system, please send them for additional analysis. Generally, I have only analysed a few versions for each software component listed at this web site. With your help I will be able to look at both old and more recent versions of the WinDir.lsass software. Thank you very much for your time!

Log references

Detection

Bazooka Adware and Spyware Scanner detects WinDir.lsass. Bazooka is freeware and detects spyware, adware, foistware, trojan horses, viruses, worms and other potentially unwanted applications. Read more »

Manual removal

Please follow the instructions below if you would like to remove WinDir.lsass manually. Please notice that you must follow the instructions very carefully and delete everything that is mentioned. In most cases the removal will fail if one single item is not deleted. If WinDir.lsass remains on your system after stepping through the removal instructions, please double-check by stepping through them again. Do not delete %WinDir%\lsass.exe unless you are 100% sure it is a threat.

1. Start your computer in safe mode.
2. Start Windows Explorer and delete:
   %WinDir%\lsass.exe
   Note: %WinDir% is a variable (?). By default, this is C:\Windows (Windows 95/98/Me/XP) or C:\WINNT (Windows NT/2000).

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Contact information for WinDir.lsass's vendor

In order to provide correct, accurate and updated information about WinDir.lsass I encourage the vendor to contact me if any part of this write-up needs a revision.