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Elastic Docs ›Elastic Security Solution [7.14] ›Detections and alerts ›Prebuilt rule reference

Modification of Boot Configuration

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Modification of Boot Configuration

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Identifies use of bcdedit.exe to delete boot configuration data. This tactic is sometimes used as by malware or an attacker as a destructive technique.

Rule type: eql

Rule indices:

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

Severity: low

Risk score: 21

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
  • Defense Evasion

Version: 8 (version history)

Added (Elastic Stack release): 7.7.0

Last modified (Elastic Stack release): 7.13.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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process where event.type in ("start", "process_started") and
(process.name : "bcdedit.exe" or process.pe.original_file_name ==
"bcdedit.exe") and (process.args : "/set" and process.args :
"bootstatuspolicy" and process.args : "ignoreallfailures") or
(process.args : "no" and process.args : "recoveryenabled")

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 8 (7.13.0 release)

  • Updated query, changed from:

    event.category:process and event.type:(start or process_started) and
process.name:bcdedit.exe and process.args:(/set and (bootstatuspolicy
and ignoreallfailures or no and recoveryenabled))
Version 7 (7.12.0 release)
  • Formatting only
Version 6 (7.11.2 release)
  • Formatting only
Version 5 (7.11.0 release)
  • Formatting only
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:

    event.action:"Process Create (rule: ProcessCreate)" and
process.name:bcdedit.exe and process.args:(/set and (bootstatuspolicy
and ignoreallfailures or no and recoveryenabled))
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