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

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Potential Microsoft Office Sandbox Evasion

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Potential Microsoft Office Sandbox Evasion

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Identifies the creation of a suspicious zip file prepended with special characters. Sandboxed Microsoft Office applications on macOS are allowed to write files that start with special characters, which can be combined with an AutoStart location to achieve sandbox evasion.

Rule type: query

Rule indices:

auditbeat-*
logs-endpoint.events.*

Severity: high

Risk score: 73

Runs every: 5 minutes

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

Maximum alerts per execution: 100

References:

Tags:

Elastic
Host
macOS
Threat Detection
Defense Evasion

Version: 100 (version history)

Added (Elastic Stack release): 7.12.0

Last modified (Elastic Stack release): 8.5.0

Rule authors: Elastic

Rule license: Elastic License v2

Rule query

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event.category:file and not event.type:deletion and file.name:~$*.zip
and host.os.type:macos

Threat mapping

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Framework: MITRE ATT&CK^TM

Tactic:
- Name: Defense Evasion
- ID: TA0005
- Reference URL: https://attack.mitre.org/tactics/TA0005/
Technique:
- Name: Virtualization/Sandbox Evasion
- ID: T1497
- Reference URL: https://attack.mitre.org/techniques/T1497/

Rule version history

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Version 100 (8.5.0 release)

Formatting only

Version 3 (8.4.0 release)

Updated query, changed from:

event.category:file and not event.type:deletion and file.name:~$*.zip

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