1200KM / sigma-rule
NTDS Exfiltration Filename Patterns — Sigma Rule
Sigma rule 3a8da4e0-36c1-40d2-8b29-b3e890d5172a. NTDS Exfiltration Filename Patterns — Sigma Rule. Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltration.
Rule metadata and linked tags
Author: Florian Roth (Nextron Systems). Source status: test; severity: high. Source dates: 2022-03-11 / 2023-05-05.
{
"product": "windows",
"category": "file_event"
}Pinned original Sigma rule · Detection Rule License 1.1
Source SHA-256: bb32b9c7f9335605634c96a2eb93283b5606324e92b9d85f2de4a03435d66a2f
Detection logic
Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.
title: NTDS Exfiltration Filename Patterns
id: 3a8da4e0-36c1-40d2-8b29-b3e890d5172a
status: test
description: Detects creation of files with specific name patterns seen used in various tools that export the NTDS.DIT for exfiltration.
references:
- https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/modules/post/windows/gather/ntds_grabber.rb
- https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/data/post/powershell/NTDSgrab.ps1
- https://github.com/SecureAuthCorp/impacket/blob/7d2991d78836b376452ca58b3d14daa61b67cb40/impacket/examples/secretsdump.py#L2405
author: Florian Roth (Nextron Systems)
date: 2022-03-11
modified: 2023-05-05
tags:
- attack.credential-access
- attack.t1003.003
logsource:
product: windows
category: file_event
detection:
selection:
TargetFilename|endswith:
- '\All.cab' # https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/data/post/powershell/NTDSgrab.ps1
- '.ntds.cleartext' # https://github.com/SecureAuthCorp/impacket/blob/7d2991d78836b376452ca58b3d14daa61b67cb40/impacket/examples/secretsdump.py#L2405
condition: selection
falsepositives:
- Unknown
level: high
False positives
- Unknown
Source references
- https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/modules/post/windows/gather/ntds_grabber.rb
- https://github.com/rapid7/metasploit-framework/blob/eb6535009f5fdafa954525687f09294918b5398d/data/post/powershell/NTDSgrab.ps1
- https://github.com/SecureAuthCorp/impacket/blob/7d2991d78836b376452ca58b3d14daa61b67cb40/impacket/examples/secretsdump.py#L2405
Connected ecosystem references
Exact source-tagged techniques
Telemetry review
Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.
Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.