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IE ZoneMap Setting Downgraded To MyComputer Zone For HTTP Protocols Via CLI

Detects changes to Internet Explorer's (IE / Windows Internet properties) ZoneMap configuration of the "HTTP" and "HTTPS" protocols to point to the "My Computer" zone. This allows downloaded files from the Internet to be granted the same level of trust as files stored locally.

Detection Query

selection:
  CommandLine|contains|all:
    - \Microsoft\Windows\CurrentVersion\Internet
      Settings\ZoneMap\ProtocolDefaults
    - http
    - " 0"
condition: selection

Author

Nasreddine Bencherchali (Nextron Systems)

Created

2023-09-05

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.executionattack.defense-evasion

Raw Content

title: IE ZoneMap Setting Downgraded To MyComputer Zone For HTTP Protocols Via CLI
id: 10344bb3-7f65-46c2-b915-2d00d47be5b0
related:
    - id: 3fd4c8d7-8362-4557-a8e6-83b29cc0d724
      type: similar
status: test
description: |
    Detects changes to Internet Explorer's (IE / Windows Internet properties) ZoneMap configuration of the "HTTP" and "HTTPS" protocols to point to the "My Computer" zone. This allows downloaded files from the Internet to be granted the same level of trust as files stored locally.
references:
    - https://twitter.com/M_haggis/status/1699056847154725107
    - https://twitter.com/JAMESWT_MHT/status/1699042827261391247
    - https://learn.microsoft.com/en-us/troubleshoot/developer/browsers/security-privacy/ie-security-zones-registry-entries
    - https://www.virustotal.com/gui/file/339ff720c74dc44265b917b6d3e3ba0411d61f3cd3c328e9a2bae81592c8a6e5/content
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-09-05
tags:
    - attack.execution
    - attack.defense-evasion
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - '\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\ProtocolDefaults'
            - 'http'
            - ' 0'
    condition: selection
falsepositives:
    - Unknown
level: high