Most antivirus programs identify lssas.exe as malware—e.g. Kaspersky identifies it as Trojan.Win32.Buzus.dmok or Worm.Win32.VBNA.b, and Microsoft identifies it as Worm:Win32/Pushbot.gen!C or Trojan:Win32/Malagent.
The free file information forum can help you find out how to remove it. If you have additional information about this file, please leave a comment or a suggestion for other users.
The process known as 5WktcyYGQzKhA2mtD8qoJYoR3gdl17S6 or j`RJNo9ydJcYplG2nrGQ[b DakJzCS]7JQFhSftxro]LHdALAGjM9IE (version No0co[UZhVS68 QFiZ97:r[@Sb_0dE BhSoXYE7am5=...) or LSA Shell (Export Version)
appears to belong to software AcroRdWin or tKRtskjZPmnvJvCuCHGh or Microsoft Windows Operating System
by MS or Microsoft (www.microsoft.com).
Description: Lssas.exe is not essential for Windows and will often cause problems. Lssas.exe is located in the C:\Windows\System32 folder—typically C:\Windows\ or C:\WINDOWS\system32\.
Known file sizes on Windows 10/8/7/XP are 131,072 bytes (20% of all occurrences), 135,168 bytes, 60,416 bytes, 459,264 bytes or 424,960 bytes.
It is not a Windows system file. The program has no file description. The program has no visible window. The file is located in the Windows folder, but it is not a Windows core file. The process uses ports to connect to or from a LAN or the Internet. The software starts when Windows starts (see Registry key: MACHINE\Run, Run, win.ini, Userinit). Lssas.exe is able to monitor applications and hide itself. Therefore the technical security rating is 88% dangerous, however you should also read the user reviews.
Recommended: Identify lssas.exe related errors
If lssas.exe is located in a subfolder of the user's profile folder, the security rating is 80% dangerous. The file size is 48,640 bytes (75% of all occurrences) or 13,179,660 bytes. There is no file information. The program has no visible window. The program starts upon Windows startup (see Registry key: MACHINE\Run, Run, win.ini, Userinit). The software uses ports to connect to or from a LAN or the Internet. Lssas.exe is not a Windows system file. Lssas.exe is able to monitor applications and manipulate other programs.
If lssas.exe is located in a subfolder of C:\Windows\System32, the security rating is 70% dangerous. The file size is 466,944 bytes (33% of all occurrences), 101,376 bytes or 434,176 bytes. The file is a file with no information about its developer. The program is not visible. It is an unknown file in the Windows folder. The program starts when Windows starts (see Registry key: MACHINE\Run, Run, win.ini, Userinit). It is not a Windows system file. Lssas.exe is able to manipulate other programs, record keyboard and mouse inputs, hide itself and monitor applications.
If lssas.exe is located in a subfolder of "C:\Program Files", the security rating is 46% dangerous. The file size is 48,640 bytes.
External information from Paul Collins:
There are different files with the same name:
Important: You should check the lssas.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.
The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active lssas process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the lssas.exe on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.
Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.