Encoded Executable Stored in the Registry

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Identifies registry write modifications to hide an encoded portable executable. This could be indicative of adversary defense evasion by avoiding the storing of malicious content directly on disk.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*
  • endgame-*

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
  • Defense Evasion
  • Elastic Endgame

Version: 101

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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registry where
/* update here with encoding combinations */
 registry.data.strings : "TVqQAAMAAAAEAAAA*"

Framework: MITRE ATT&CKTM