ADExplorer Writing Complete AD Snapshot Into .dat File

Description

Detects the dual use tool ADExplorer writing a complete AD snapshot into a .dat file. This can be used by attackers to extract data for Bloodhound, usernames for password spraying or use the meta data for social engineering. The snapshot doesn't contain password hashes but there have been cases, where administrators put passwords in the comment field.

Query · sigma

selection:
  Image|endswith:
  - \ADExp.exe
  - \ADExplorer.exe
  - \ADExplorer64.exe
  - \ADExplorer64a.exe
  TargetFilename|endswith: .dat
condition: selection

Known false positives

  • Legitimate use of ADExplorer by administrators creating .dat snapshots
Raw source ADExplorer Writing Complete AD Snapshot Into .dat File · Sigma
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Published by SigmaHQ/sigma ↗, licensed under Detection Rule License 1.1 ↗. Reproduced here unmodified. 
title: ADExplorer Writing Complete AD Snapshot Into .dat File
id: 0a1255c5-d732-4b62-ac02-b5152d34fb83
related:
    - id: 9212f354-7775-4e28-9c9f-8f0a4544e664
      type: similar
status: experimental
description: Detects the dual use tool ADExplorer writing a complete AD snapshot into a .dat file. This can be used by attackers to extract data for Bloodhound, usernames for password spraying or use the meta data for social engineering. The snapshot doesn't contain password hashes but there have been cases, where administrators put passwords in the comment field.
references:
    - https://learn.microsoft.com/de-de/sysinternals/downloads/adexplorer
    - https://github.com/c3c/ADExplorerSnapshot.py/tree/f700904defac330802bbfedd1d8ffd9248f4ee24
    - https://www.packetlabs.net/posts/scattered-spider-is-a-young-ransomware-gang-exploiting-large-corporations/
    - https://www.nccgroup.com/us/research-blog/lapsus-recent-techniques-tactics-and-procedures/
    - https://trustedsec.com/blog/adexplorer-on-engagements
author: Arnim Rupp (Nextron Systems), Thomas Patzke
date: 2025-07-09
tags:
    - attack.discovery
    - attack.t1087.002
    - attack.t1069.002
    - attack.t1482
logsource:
    category: file_event
    product: windows
detection:
    selection:
        Image|endswith:
            - '\ADExp.exe'
            - '\ADExplorer.exe'
            - '\ADExplorer64.exe'
            - '\ADExplorer64a.exe'
        TargetFilename|endswith: '.dat'
    condition: selection
falsepositives:
    - Legitimate use of ADExplorer by administrators creating .dat snapshots
level: medium

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