Detection rules › Sigma

Ntdsutil Abuse

Status
test
Severity
medium
Log source
product windows, service application
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects potential abuse of ntdsutil to dump ntds.dit database

MITRE ATT&CK coverage

TacticTechniques
Credential AccessT1003.003 OS Credential Dumping: NTDS

Event coverage

Rule body yaml

title: Ntdsutil Abuse
id: e6e88853-5f20-4c4a-8d26-cd469fd8d31f
status: test
description: Detects potential abuse of ntdsutil to dump ntds.dit database
references:
    - https://twitter.com/mgreen27/status/1558223256704122882
    - https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2012-r2-and-2012/jj574207(v=ws.11)
author: Nasreddine Bencherchali (Nextron Systems)
date: 2022-08-14
tags:
    - attack.credential-access
    - attack.t1003.003
logsource:
    product: windows
    service: application
    # warning: The 'data' field used in the detection section is the container for the event data as a whole. You may have to adapt the rule for your backend accordingly
detection:
    selection:
        Provider_Name: 'ESENT'
        EventID:
            - 216
            - 325
            - 326
            - 327
        Data|contains: 'ntds.dit'
    condition: selection
falsepositives:
    - Legitimate backup operation/creating shadow copies
level: medium

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Provider_Name: 'ESENT'
    EventID:
        - 216
        - 325
        - 326
        - 327
    Data|contains: 'ntds.dit'

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
Datamatch
  • ntds.dit corpus 2 (sigma 2)
Provider_Nameeq
  • ESENT corpus 2 (sigma 2)