Detectionmediumtest
Suspicious CodePage Switch Via CHCP
Detects a code page switch in command line or batch scripts to a rare language
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Florian Roth (Nextron Systems), Jonhnathan Ribeiro, oscd.communityCreated Mon Oct 14Updated Tue Mar 07c7942406-33dd-4377-a564-0f62db0593a3windows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic1 selector
detection:
selection:
Image|endswith: '\chcp.com'
CommandLine|endswith:
- ' 936' # Chinese
# - ' 1256' # Arabic
- ' 1258' # Vietnamese
# - ' 855' # Russian
# - ' 866' # Russian
# - ' 864' # Arabic
condition: selectionFalse Positives
Administrative activity (adjust code pages according to your organization's region)
MITRE ATT&CK
Tactics
Techniques
Rule Metadata
Rule ID
c7942406-33dd-4377-a564-0f62db0593a3
Status
test
Level
medium
Type
Detection
Created
Mon Oct 14
Modified
Tue Mar 07
Path
rules/windows/process_creation/proc_creation_win_chcp_codepage_switch.yml
Raw Tags
attack.t1036attack.defense-evasion