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High Severity

Attachment: Filename containing Unicode braille pattern blank character

Description

Recursively identifies attachments that attempt to conceal their true file extension by using Braille Pattern Blank characters

@vector_sec
Created Feb 20th, 2025 • Last updated Aug 5th, 2025
Source
type.inbound
and any(attachments,
        regex.icontains(.file_name, '\x{2800}')
        or (
          .file_extension in~ $file_extensions_common_archives
          and any(file.explode(.), regex.icontains(.file_name, '\x{2800}'))
        )
)
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