LSASS Process Memory Dump Creation Via Taskmgr.EXE

Severity: high
Author: Swachchhanda Shrawan Poudel
Source: upstream

Detects the creation of an "lsass.dmp" file by the taskmgr process. This indicates a manual dumping of the LSASS.exe process memory using Windows Task Manager.

MITRE ATT&CK coverage

Tactic	Techniques
Credential Access	`T1003.001` OS Credential Dumping: LSASS Memory

Event coverage

Provider	Event ID	Title
Sysmon	11	FileCreate

Stages and Predicates

Stage 1: `selection`

or:
Image|endswith: ':\Windows\SysWOW64\taskmgr.exe'
Image|endswith: ':\Windows\system32\taskmgr.exe'
TargetFilename|contains: .DMP
TargetFilename|contains: '\AppData\Local\Temp\'
TargetFilename|contains: '\lsass'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.