Why is lsass.exe using so much memory?
The amount of memory that LSASS uses on a DC increases in accordance with Active Directory usage. When data is queried, it is cached in memory. As a result, it is normal to see LSASS using an amount of memory that is larger than the size of the Active Directory database file (NTDS. dit).
How do I fix lsass.exe high CPU usage?

lsass.exe High CPU and Disk usage
- 1] Check for malware. The main cause of this High CPU and Disk usage issue cannot be narrowed down to a single culprit, and that is malware.
- 2] Run SFC scan.
- 3] Use Performance Monitor’s Active Directory Data Collector.
What is lsass.exe server 2008?
Local Security Authority Subsystem Service (Lsass.exe) is the process on an Active Directory domain controller. It’s responsible for providing Active Directory database lookups, authentication, and replication.
Is lsass.exe a virus?
The lsass.exe (L not an i) file included with Microsoft Windows is not spyware, a trojan, or a virus. However, like any file on your computer it can become corrupted by a virus or trojan. Antivirus programs can detect and clean this file if it has become infected.

Can you disable lsass?
Before learning how to delete a lsass.exe infection, remember that you cannot delete the real lsass.exe file, nor can you disable it or shut it down for any reason.
How do I stop lsass.exe from running?
Shut down the fake lsass.exe process and then delete the file. You can do this a number of ways, but the easiest is to right-click the task in the Processes tab of Task Manager and select End task. If you don’t see the task there, look for it under the Details tab, right-click it, and choose End process tree.
What is lsass process memory?
Domain, local usernames, and passwords that are stored in the memory space of a process are named LSASS (Local Security Authority Subsystem Service). If given the requisite permissions on the endpoint, users can be given access to LSASS and its data can be extracted for lateral movement and privilege escalation.
Does lsass.exe need Internet?
it’s a legit exe belonging to windows update program, it must be allowed to access freely the internet, you can find it in C:windowssystem32 then right click on it and have it checked by WSA if you’re still unsure.