Registry Persistence via AppCert DLL

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Detects attempts to maintain persistence by creating registry keys using AppCert DLLs. AppCert DLLs are loaded by every process using the common API functions to create processes.

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: None

Tags:

  • Elastic
  • Host
  • Windows
  • Threat Detection
  • Persistence

Version: 7

Rule authors:

  • Elastic

Rule license: Elastic License v2

Investigation guide

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Rule query

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registry where
/* uncomment once stable length(bytes_written_string) > 0 and */
  registry.path : "HKLM\\SYSTEM\\*ControlSet*\\Control\\Session Manager\\AppCertDLLs\\*"

Framework: MITRE ATT&CKTM