IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
« Suspicious DLL Loaded for Persistence or Privilege Escalation Unusual Print Spooler Child Process »
Elastic Docs ›Elastic Security Solution [8.5] ›Downloadable rule update v8.1.1

Suspicious Print Spooler File Deletion

edit

Suspicious Print Spooler File Deletion

edit

Detects deletion of print driver files by an unusual process. This may indicate a clean up attempt post successful privilege escalation via Print Spooler service related vulnerabilities.

Rule type: eql

Rule indices:

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

Severity: medium

Risk score: 47

Runs every: 5m

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

Maximum alerts per execution: 100

References:

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Privilege Escalation

Version: 3

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

edit
## Config

If enabling an EQL rule on a non-elastic-agent index (such as beats) for versions <8.2, events will not define `event.ingested` and default fallback for EQL rules was not added until 8.2, so you will need to add a custom pipeline to populate `event.ingested` to @timestamp for this rule to work.

Rule query

edit
file where event.type : "deletion" and
 not process.name : ("spoolsv.exe", "dllhost.exe", "explorer.exe") and
 file.path : "?:\\Windows\\System32\\spool\\drivers\\x64\\3\\*.dll"

Framework: MITRE ATT&CKTM

« Suspicious DLL Loaded for Persistence or Privilege Escalation Unusual Print Spooler Child Process »