IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.

« Enable Host Network Discovery via Netsh Encrypting Files with WinRar or 7z »

› › ›

Encoded Executable Stored in the Registry

edit

Encoded Executable Stored in the Registry

edit

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.*

Severity: medium

Risk score: 47

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: 6 (version history)

Added (Elastic Stack release): 7.11.0

Last modified (Elastic Stack release): 8.4.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

edit

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

Threat mapping

edit

Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Deobfuscate/Decode Files or Information
- ID: T1140
- Reference URL: https://attack.mitre.org/techniques/T1140/

Rule version history

edit

Version 6 (8.4.0 release)

Formatting only

Version 5 (8.1.0 release)

Formatting only

Version 4 (7.16.0 release)

Formatting only

Version 3 (7.12.0 release)

Formatting only

Version 2 (7.11.2 release)

Formatting only

« Enable Host Network Discovery via Netsh Encrypting Files with WinRar or 7z »