Microsoft Build Engine Loading Windows Credential Librariesedit

An instance of MSBuild, the Microsoft Build Engine, loaded DLLs (dynamically linked libraries) responsible for Windows credential management. This technique is sometimes used for credential dumping.

Rule type: query

Rule indices:

  • winlogbeat-*
  • logs-endpoint.events.*
  • logs-windows.*

Severity: high

Risk score: 73

Runs every: 5 minutes

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Credential Access

Version: 7 (version history)

Added (Elastic Stack release): 7.7.0

Last modified (Elastic Stack release): 7.12.0

Rule authors: Elastic

Rule license: Elastic License v2

Potential false positivesedit

The Build Engine is commonly used by Windows developers but use by non-engineers is unusual.

Rule queryedit

event.category:process and event.type:change and
(process.pe.original_file_name:(vaultcli.dll or SAMLib.DLL) or
dll.name:(vaultcli.dll or SAMLib.DLL)) and process.name: MSBuild.exe

Threat mappingedit

Framework: MITRE ATT&CKTM

Rule version historyedit

Version 7 (7.12.0 release)
  • Formatting only
Version 6 (7.11.2 release)
  • Formatting only
Version 5 (7.11.0 release)
  • Updated query, changed from:

    event.category:process and event.type:change and
    (winlog.event_data.OriginalFileName:(vaultcli.dll or SAMLib.DLL) or
    dll.name:(vaultcli.dll or SAMLib.DLL)) and process.name: MSBuild.exe
Version 4 (7.10.0 release)
  • Formatting only
Version 3 (7.9.1 release)
  • Formatting only
Version 2 (7.9.0 release)
  • Updated query, changed from:

    (winlog.event_data.OriginalFileName: (vaultcli.dll or SAMLib.DLL) or
    dll.name: (vaultcli.dll or SAMLib.DLL)) and process.name: MSBuild.exe
    and event.action: "Image loaded (rule: ImageLoad)"