[martin_fierro]

According to Google.com,

lsas.exe might be an FTP program?

csrss.exe = Win32 subsystem server process

and

smss.exe (and csrss.exe) are filenames commonly found in the %SystemRoot%\System32 directory. Presence of these 2 files in the System32 directory is not an indication of infection.

[agitator]

lsass.exe is the Local Security Authority process and is a standard system process. Don't mess with it. :)