lsass.exe is a application which is probably NOT a virus or malware. So, if lsass.exe is on your system, it is probably ok, and will NOT be a cause for concern. Even if your PC is virus-free, it is still recommended to run a good antivirus with a good track record, in order to yourself yourself against viruses and malware.
Usually, the default filename and directory where this application is stored is
C:\Windows\System32\lsass.exe.
The MD5 checksum for this executable is 60e18f7b8d1f43731d0e9169c2d16547.
This application is registered as a Windows service. This means it operates on your PC in background, usually without displaying anything to you. Most Windows services are ok programs, which perform useful features to other programs or to the Windows Operating System.
This application uses the Internet to communicate. Today this is expected from a program. For example, most of the apps on your computer check for updates. For this, Internet communications are necessary.
lsass.exe appears to have something to do with Windows SFC (System File Checker) or Windows File Protection.
This is a x64 executable. It runs using the full capacity of nowadays' computer processors.
lsass.exe has a digital signature. Nowadays the large majority of legit software applications are digitally signed.
The digital signature found in lsass.exe verifies as ok. This is very good.
Digitally signed by: Microsoft Windows Publisher
Certificate's issuer name: Microsoft Windows Production PCA 2011
This application does NOT have an uninstall command set up in registry.