Windows LSASS Memory Access Triggered by Source Image Containing 'dump' Keyword

Alerts when a process named with 'dump' requests specific access rights to lsass.exe on Windows.

FreeReviewedSigma · High · v2

Product: windows
Category: process_access
Author: Florian Roth (Nextron Systems) (SigmaHQ), DRL 1.1
Published: 2022-02-10
Updated: 2026-07-31

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 process access events where the target process is lsass.exe and the source process image name contains the keyword "dump". It also requires the granted access value to match a set of specific hexadecimal and numeric rights consistent with attempts to read or capture sensitive process memory. This matters because attackers may use tools with "dump" in the filename to obtain credential material from LSASS. The detection relies on Windows process access telemetry that records SourceImage, TargetImage, and GrantedAccess values.

Reporting behind it

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Windows LSASS Memory Access Triggered by Source Image Containing 'dump' Keyword

Pivot detection · T1003.001 · 9 related

Changelog

v2
Candidate ingested via manual entry.2026-07-31
v1
No changelog recorded for this version.2026-07-30

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

windows-lsass-memory-access-triggered-by-process-name-containing-dump-9bd012ee

title: Windows LSASS Memory Access Triggered by Source Image Containing 'dump' Keyword
id: 4cf15381-49dd-49d1-9e3f-931c14257cc9
status: test
description: This rule identifies process access events where the target process is lsass.exe and the source process image name contains the keyword "dump". It also requires the granted access value to match a set of specific hexadecimal and numeric rights consistent with attempts to read or capture sensitive process memory. This matters because attackers may use tools with "dump" in the filename to obtain credential material from LSASS. The detection relies on Windows process access telemetry that records SourceImage, TargetImage, and GrantedAccess values.
references:
  - https://twitter.com/_xpn_/status/1491557187168178176
  - https://www.ired.team/offensive-security/credential-access-and-credential-dumping/dump-credentials-from-lsass-process-without-mimikatz
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_access/proc_access_win_lsass_dump_keyword_image.yml
author: Florian Roth (Nextron Systems), Huntrule Team
date: 2022-02-10
modified: 2023-11-29
tags:
  - attack.credential-access
  - attack.t1003.001
  - attack.s0002
logsource:
  category: process_access
  product: windows
detection:
  selection:
    TargetImage|endswith: \lsass.exe
    SourceImage|contains: dump
    GrantedAccess|endswith:
      - "10"
      - "30"
      - "50"
      - "70"
      - "90"
      - B0
      - D0
      - F0
      - "18"
      - "38"
      - "58"
      - "78"
      - "98"
      - B8
      - D8
      - F8
      - 1A
      - 3A
      - 5A
      - 7A
      - 9A
      - BA
      - DA
      - FA
      - "0x14C2"
      - FF
  condition: selection
falsepositives:
  - Rare programs that contain the word dump in their name and access lsass
level: high
license: DRL-1.1
related:
  - id: 9bd012ee-0dff-44d7-84a0-aa698cfd87a3
    type: derived

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