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Elastic Docs ›Elastic Security Solution [8.4] ›Detections and alerts ›Prebuilt rule reference

Potential Secure File Deletion via SDelete Utility

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Potential Secure File Deletion via SDelete Utility

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Detects file name patterns generated by the use of Sysinternals SDelete utility to securely delete a file via multiple file overwrite and rename operations.

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): 7.10.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Investigation guide

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## Triage and analysis

Verify process details such as command line and hash to confirm this activity legitimacy.

Rule query

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file where event.type == "change" and file.name : "*AAA.AAA"

Threat mapping

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Framework: MITRE ATT&CKTM

Rule version history

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Version 8 (8.4.0 release)
  • Formatting only
Version 6 (8.2.0 release)
  • Formatting only
Version 5 (7.13.0 release)
  • Formatting only
Version 4 (7.12.0 release)

  • Updated query, changed from:

    file where event.type == "change" and wildcard(file.name,"*AAA.AAA")
Version 3 (7.11.2 release)
  • Formatting only
Version 2 (7.11.0 release)

  • Updated query, changed from:

    event.category:file AND event.type:change AND file.name:/.+A+\.AAA/
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