Sigma rule: Credential Dumping by Pypykatz

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-c8e9bba0b6e1, updated 2022-10-09T00:00:00.000Z.

Rule

Title
Credential Dumping by Pypykatz
Status
test
Level
critical
Author
Bhabesh Raj
Date
2021/08/03
Modified
2022/10/09
File
deprecated/windows/proc_access_win_pypykatz_cred_dump_lsass_access.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects LSASS process access by pypykatz for credential dumping.

Log source

product
windows
category
process_access

Detection

selection:
    TargetImage|endswith: '\lsass.exe'
    CallTrace|contains|all:
        - 'C:\Windows\SYSTEM32\ntdll.dll+'
        - 'C:\Windows\System32\KERNELBASE.dll+'
        - 'libffi-7.dll'
        - '_ctypes.pyd+'
        - 'python3*.dll+'   # Pypy requires python>=3.6
    GrantedAccess: '0x1FFFFF'
condition: selection

False positives (as the rule lists them)

  • Unknown

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/deprecated/windows/proc_access_win_pypykatz_cred_dump_lsass_access.yml

Sources and licences

  • SigmaHQ

    "Credential Dumping by Pypykatz" by Bhabesh Raj (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_access_win_pypykatz_cred_dump_lsass_access.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: Credential Dumping by Pypykatz",
entity page, dataset version ref-c8e9bba0b6e1, updated 2022-10-09T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/7186e989-4ed7-4f4e-a656-4674b9e3e48b (accessed 2026-11-03).
Underlying source: SigmaHQ rule 7186e989-4ed7-4f4e-a656-4674b9e3e48b, 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.