magicnumbers

← home

FF

Windows executable

category
file-signature
normalized
ff
confirmed
2026-03-15
lookups
1
source
https://www.garykessler.net/

Windows executable. File extension(s): SYS. Kessler type: Windows.

Similar magic numbers

valuenamecategory
FF FF FF FF DOS system driver file-signature
FF D8 FF JPEG image file-signature
FF FE Windows Registry file / UTF-32-UCS-2 file file-signature
FF F1 MPEG-4 AAC audio file-signature
FE FF UTF-16-UCS-2 file file-signature