Detection rules › Sigma
Disable Macro Runtime Scan Scope
Detects tampering with the MacroRuntimeScanScope registry key to disable runtime scanning of enabled macros
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Impairment | No specific technique |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 13: RegistryEvent (Value Set) |
Rule body
title: Disable Macro Runtime Scan Scope
id: ab871450-37dc-4a3a-997f-6662aa8ae0f1
description: Detects tampering with the MacroRuntimeScanScope registry key to disable runtime scanning of enabled macros
status: test
date: 2022-10-25
modified: 2023-08-17
author: Nasreddine Bencherchali (Nextron Systems)
references:
- https://www.microsoft.com/en-us/security/blog/2018/09/12/office-vba-amsi-parting-the-veil-on-malicious-macros/
- https://admx.help/?Category=Office2016&Policy=office16.Office.Microsoft.Policies.Windows::L_MacroRuntimeScanScope
- https://github.com/S3cur3Th1sSh1t/OffensiveVBA/blob/28cc6a2802d8176195ac19b3c8e9a749009a82a3/src/AMSIbypasses.vba
tags:
- attack.defense-impairment
logsource:
product: windows
category: registry_set
detection:
selection:
TargetObject|contains|all:
- '\SOFTWARE\'
- '\Microsoft\Office\'
- '\Common\Security'
TargetObject|endswith: '\MacroRuntimeScanScope'
Details: DWORD (0x00000000)
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
TargetObject|contains|all:
- '\SOFTWARE\'
- '\Microsoft\Office\'
- '\Common\Security'
TargetObject|endswith: '\MacroRuntimeScanScope'
Details: DWORD (0x00000000)
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
Details | eq |
| field:"Details" kind:eq value:"DWORD (0x00000000)" |
TargetObject | ends_with |
| field:"TargetObject" kind:ends_with value:"\MacroRuntimeScanScope" |
TargetObject | match |
| field:"TargetObject" kind:match |