Windows Registry: SilentProcessExit lsass.exe Monitor Registration for Credential Dumping

ATT&CK techniques

Cred Access

Recon
Resource Dev
Initial Access
Execution
Persistence
Priv Esc
Defense Evasion
Cred Access
- T1003.001LSASS Memory
Discovery
Lateral Movement
Collection
C2
Exfiltration
Impact

What it detects

This rule identifies registry changes that register a monitor for silent process exit of lsass.exe under the SilentProcessExit key path. Attackers can use this technique to trigger actions on lsass.exe termination that may support memory dumping and credential access. It relies on Windows registry event telemetry matching TargetObject paths containing Microsoft\Windows NT\CurrentVersion\SilentProcessExit\lsass.exe.

Reporting behind it

Related detections9 linkedT1003.001 — drag to rearrange

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Windows Registry: SilentProcessExit lsass.exe Monitor Registration for Credential Dumping

Pivot detection · T1003.001 · 9 related

Detection content is published as a reviewed draft. Tune thresholds and exclusions against your own telemetry before enabling this rule for alerting.

windows-registry-silentprocessexit-lsass-exe-monitor-registration-for-credential-55e29995

title: "Windows Registry: SilentProcessExit lsass.exe Monitor Registration for Credential Dumping"
id: 9109b71b-2ca1-42fd-a222-8e73a2236a36
related:
  - id: 36803969-5421-41ec-b92f-8500f79c23b0
    type: similar
  - id: 55e29995-75e7-451a-bef0-6225e2f13597
    type: derived
status: test
description: This rule identifies registry changes that register a monitor for silent process exit of lsass.exe under the SilentProcessExit key path. Attackers can use this technique to trigger actions on lsass.exe termination that may support memory dumping and credential access. It relies on Windows registry event telemetry matching TargetObject paths containing Microsoft\Windows NT\CurrentVersion\SilentProcessExit\lsass.exe.
references:
  - https://www.deepinstinct.com/2021/02/16/lsass-memory-dumps-are-stealthier-than-ever-before-part-2/
  - https://oddvar.moe/2018/04/10/persistence-using-globalflags-in-image-file-execution-options-hidden-from-autoruns-exe/
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/registry/registry_event/registry_event_silentprocessexit_lsass.yml
author: Florian Roth (Nextron Systems), Huntrule Team
date: 2021-02-26
modified: 2022-12-19
tags:
  - attack.credential-access
  - attack.t1003.001
logsource:
  category: registry_event
  product: windows
detection:
  selection:
    TargetObject|contains: Microsoft\Windows NT\CurrentVersion\SilentProcessExit\lsass.exe
  condition: selection
falsepositives:
  - Unlikely
level: critical
license: DRL-1.1

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