Title:
LSASS Access Detected via Attack Surface Reduction
Status:
test
Description:Detects Access to LSASS Process
References:
-https://learn.microsoft.com/en-us/defender-endpoint/attack-surface-reduction
Author: Markus Neis
Date: 2018-08-26
modified:2022-08-13
Tags:
- -'attack.credential-access'
- -'attack.t1003.001'
Logsource:
- product: windows
- service: windefend
- definition: Requirements:Enabled Block credential stealing from the Windows local security authority subsystem (lsass.exe) from Attack Surface Reduction (GUID: 9e6c4e1f-7d60-472f-ba1a-a39ef669e4b2)
Detection:
selection:
EventID:
'1121'
Path|endswith:
'\lsass.exe'
filter_thor:
ProcessName|startswith:
'C:\Windows\Temp\asgard2-agent\'
ProcessName|endswith:
-'\thor64.exe'
-'\thor.exe'
filter_exact:
ProcessName:
-'C:\Windows\System32\atiesrxx.exe'
-'C:\Windows\System32\CompatTelRunner.exe'
-'C:\Windows\System32\msiexec.exe'
-'C:\Windows\System32\nvwmi64.exe'
-'C:\Windows\System32\svchost.exe'
-'C:\Windows\System32\Taskmgr.exe'
-'C:\Windows\System32\wbem\WmiPrvSE.exe'
-'C:\Windows\SysWOW64\msiexec.exe'
filter_begins:
ProcessName|startswith:
-'C:\Windows\System32\DriverStore\'
-'C:\WINDOWS\Installer\'
-'C:\Program Files\'
-'C:\Program Files (x86)\'
condition:
selection and not 1 of filter_*
Falsepositives:
-Google Chrome GoogleUpdate.exe
-Some Taskmgr.exe related activity
Level:
high
