SigmaHQ/rules/windows/process_creation/win_susp_codepage_switch.yml

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title: Suspicious Code Page Switch
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id: c7942406-33dd-4377-a564-0f62db0593a3
status: experimental
description: Detects a code page switch in command line or batch scripts to a rare language
author: Florian Roth
date: 2019/10/14
references:
- https://docs.microsoft.com/en-us/windows/win32/intl/code-page-identifiers
- https://twitter.com/cglyer/status/1183756892952248325
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine:
- 'chcp* 936' # Chinese
# - 'chcp* 1256' # Arabic
- 'chcp* 1258' # Vietnamese
# - 'chcp* 855' # Russian
# - 'chcp* 866' # Russian
# - 'chcp* 864' # Arabic
condition: selection
fields:
- ParentCommandLine
falsepositives:
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- "Administrative activity (adjust code pages according to your organisation's region)"
level: medium