Sigma rule: LSASS Process Memory Dump Creation Via Taskmgr.EXE

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-ad00de53d23f, updated 2023-10-19T00:00:00.000Z.

Rule

Title
LSASS Process Memory Dump Creation Via Taskmgr.EXE
Status
test
Level
high
Author
Swachchhanda Shrawan Poudel
Date
2023-10-19
File
rules/windows/file/file_event/file_event_win_taskmgr_lsass_dump.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

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.

Log source

product
windows
category
file_event

Detection

selection:
    Image|endswith:
        - ':\Windows\system32\taskmgr.exe'
        - ':\Windows\SysWOW64\taskmgr.exe'
    TargetFilename|contains|all:
        - '\AppData\Local\Temp\'
        - '\lsass'
        - '.DMP'
condition: selection

False positives (as the rule lists them)

  • Rare case of troubleshooting by an administrator or support that has to be investigated regardless

Tags

  • attack.credential-access
  • attack.t1003.001

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_taskmgr_lsass_dump.yml

Sources and licences

  • SigmaHQ

    "LSASS Process Memory Dump Creation Via Taskmgr.EXE" by Swachchhanda Shrawan Poudel (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/file/file_event/file_event_win_taskmgr_lsass_dump.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: LSASS Process Memory Dump Creation Via Taskmgr.EXE",
entity page, dataset version ref-ad00de53d23f, updated 2023-10-19T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/69ca12af-119d-44ed-b50f-a47af0ebc364 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 69ca12af-119d-44ed-b50f-a47af0ebc364, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.