How to remove the Lcass virus
Most antivirus programs identify Lcass.exe as malware, e.g. Avast identifies it as Win32:Trojan-gen {Other}, and Kaspersky identifies it as Backdoor.Win32.VB.ags or Backdoor.Win32.Rbot.gen.
The free file information forum can help you find out how to remove it. If you know more about this file, please leave a comment or a hint for other users.
Click to Run a Free Virus Scan for the Lcass.exe malware
Lcass.exe file information
The process known as or Ap appears to be part of software Usb Brower or Ap or Project1 by Miorosoft or Microsoft (www.microsoft.com) or Ap.
Description: Lcass.exe is located in the folder C:\Windows\System32.
Known file sizes on Windows 7/XP are 308,810 bytes (23% of all occurrences), 183,808 bytes and 7 more variants. 
It is not a Windows system file. The program is not visible. Lcass.exe is located in the Windows folder, but it is not a Windows core file. Program listens for or sends data on open ports to a LAN or the Internet. The process starts when Windows starts (see Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices, HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run).
Lcass.exe is able to record inputs, hide itself and monitor applications.
Therefore the technical security rating is 74% dangerous, however also read the users reviews.
Recommended: Identify Lcass.exe related errors
If Lcass.exe is located in the folder C:\Windows, the security rating is 70% dangerous. The file size is 135,168 bytes (66% of all occurrences) or 4,317,184 bytes. There is no information about the author of the file. File Lcass.exe is an unknown file in the Windows folder. The program is not visible. The application starts when Windows starts (see Registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run, HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices, HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run). File Lcass.exe is not a Windows system file.
Important: Some malware camouflages itself as Lcass.exe, particularly when located in the c:\windows or c:\windows\system32 folder. Therefore, you should check the Lcass.exe process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.
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User Comments
Lcass scanner
Security Task Manager shows all running Windows tasks including embedded hidden functions (e.g. keyboard or browser monitoring, autostart entry). A unique security risk rating indicates the likelihood of the process being potential spyware, malware, keylogger or a Trojan. MalwareBytes detects and removes sleeping spyware, adware, trojans, keyloggers, malware and tracking threats from your hard disk. Ideal supplement to Security Task Manager. SpeedUpMyPC scans, cleans, repairs and optimizes your computer. |
Other processes
chkdisk.exe ecmcomsocketlistenerservice.exe netknlhm.dll Lcass.exe 375013.dll etdctrlhelper.exe whse.exe aclayers.dll netdde.dll oleext.dll rebuild.exe [all]
Johannes Faber