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refactor(rules): Rename and restructure LSASS memory dump rule #688

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rabbitstack merged 1 commit into from
Jul 6, 2026
Merged

refactor(rules): Rename and restructure LSASS memory dump rule #688

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33 changes: 15 additions & 18 deletions ...redential_access_lsass_memory_dumping.yml → ...al_access_potential_lsass_memory_dump.yml
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Original file line number Diff line number Diff line change
@@ -1,10 +1,13 @@
name: LSASS memory dumping via legitimate or offensive tools
name: Potential LSASS memory dump
id: 335795af-246b-483e-8657-09a30c102e63
version: 1.2.1
version: 2.0.0
description: |
Detects an attempt to dump the LSAAS memory to the disk by employing legitimate
tools such as procdump, Task Manager, Process Explorer or built-in Windows tools
such as comsvcs.dll.
Detects attempts to dump the LSASS process memory to disk for credential
extraction. LSASS (Local Security Authority Subsystem Service) stores
credential material in its process memory including NTLM hashes, Kerberos
tickets. Adversaries who obtain a full or mini memory dump of LSASS process
can extract these credentials offline using tools such as Mimikatz, pypykatz,
or Volatility.
labels:
tactic.id: TA0006
tactic.name: Credential Access
Expand All @@ -29,24 +32,18 @@ condition: >
ps.exe not imatches
(
'?:\\Windows\\System32\\svchost.exe',
'?:\\Windows\\System32\\csrss.exe',
'?:\\Windows\\System32\\lsm.exe',
'?:\\Windows\\system32\\MRT.exe',
'?:\\Windows\\System32\\wininit.exe',
'?:\\Windows\\System32\\services.exe',
'?:\\ProgramData\\Microsoft\\Windows Defender\\*\\MsMpEng.exe'
)
|
|create_new_file and
file.path not imatches
(
'?:\\$WinREAgent\\Scratch\\*',
'?:\\Windows\\WinSxS\\*',
'?:\\Windows\\CbsTemp\\*',
'?:\\Windows\\SoftwareDistribution\\*'
) and
(file.extension iin ('.dmp', '.mdmp', '.dump') or is_minidump(file.path))
|
|create_file and file.extension iin ('.dmp', '.mdmp', '.dump')|

output: >
Detected an attempt by `%1.ps.name` process to access and read
the memory of the **Local Security And Authority Subsystem Service**
and subsequently write the `%2.file.path` dump file to the disk device
Detected LSASS access by process %1.ps.exe and subsequent dump file %2file.path creation
severity: critical

min-engine-version: 3.0.0
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