Windows File Creation of Dumpert Default Dump (dumpert.dmp)

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 flags creation of the default memory dump file named dumpert.dmp on Windows, which is associated with Dumpert process dumping activity targeting LSASS memory. Attackers may use process dump files to extract credentials from memory, making this file creation a high-signal credential access artifact. It relies on file event telemetry that records when a file is created with a filename ending in dumpert.dmp.

Reporting behind it

Related detections9 linkedT1003.001 — drag to rearrange

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Windows File Creation of Dumpert Default Dump (dumpert.dmp)

Pivot detection · T1003.001 · 9 related

Changelog

v2

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-hacktool-outflank-dumpert-default-dump-file-creation-93d94efc

title: Windows File Creation of Dumpert Default Dump (dumpert.dmp)
id: 9791bdee-7410-45ed-9f91-2303fed72270
related:
  - id: 2704ab9e-afe2-4854-a3b1-0c0706d03578
    type: derived
  - id: 93d94efc-d7ad-4161-ad7d-1638c4f908d8
    type: derived
status: test
description: This rule flags creation of the default memory dump file named dumpert.dmp on Windows, which is associated with Dumpert process dumping activity targeting LSASS memory. Attackers may use process dump files to extract credentials from memory, making this file creation a high-signal credential access artifact. It relies on file event telemetry that records when a file is created with a filename ending in dumpert.dmp.
references:
  - https://github.com/outflanknl/Dumpert
  - https://unit42.paloaltonetworks.com/actors-still-exploiting-sharepoint-vulnerability/
  - https://github.com/SigmaHQ/sigma/blob/master/rules/windows/file/file_event/file_event_win_hktl_dumpert.yml
author: Florian Roth (Nextron Systems), Huntrule Team
date: 2020-02-04
modified: 2023-05-09
tags:
  - attack.credential-access
  - attack.t1003.001
logsource:
  category: file_event
  product: windows
detection:
  selection:
    TargetFilename|endswith: dumpert.dmp
  condition: selection
falsepositives:
  - Very unlikely
level: critical
license: DRL-1.1

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