Uncommon Connection to Active Directory Web Services

calendar Aug 29, 2024 · attack.discovery attack.t1087  ·
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Detects uncommon network connections to the Active Directory Web Services (ADWS) from processes not typically associated with ADWS management.

Sigma rule (View on GitHub)

 1title: Uncommon Connection to Active Directory Web Services
 2id: b3ad3c0f-c949-47a1-a30e-b0491ccae876
 3status: experimental
 4description: |
 5        Detects uncommon network connections to the Active Directory Web Services (ADWS) from processes not typically associated with ADWS management.
 6references:
 7    - https://medium.com/falconforce/soaphound-tool-to-collect-active-directory-data-via-adws-165aca78288c
 8    - https://github.com/FalconForceTeam/FalconFriday/blob/master/Discovery/ADWS_Connection_from_Unexpected_Binary-Win.md
 9author: '@kostastsale'
10date: 2024-01-26
11tags:
12    - attack.discovery
13    - attack.t1087
14logsource:
15    category: network_connection
16    product: windows
17detection:
18    selection:
19        Initiated: true
20        DestinationPort: 9389
21    filter_main_dsac:
22        Image: 'C:\Windows\system32\dsac.exe'
23    filter_main_ms_monitoring_agent:
24        Image: 'C:\Program Files\Microsoft Monitoring Agent\'
25    filter_main_powershell:
26        Image|startswith:
27            - 'C:\Program Files\PowerShell\7\pwsh.exe'
28            - 'C:\Program Files\PowerShell\7-preview\pwsh.ex'
29            - 'C:\Windows\System32\WindowsPowerShell\'
30            - 'C:\Windows\SysWOW64\WindowsPowerShell\'
31    condition: selection and not 1 of filter_main_*
32falsepositives:
33    - ADWS is used by a number of legitimate applications that need to interact with Active Directory. These applications should be added to the allow-listing to avoid false positives.
34level: medium

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