magicnumbers

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4D 5A

DOS/Windows executable (MZ)

category
file-signature
normalized
4d5a
confirmed
2026-05-11
lookups
2
source
https://learn.microsoft.com/windows/win32/debug/pe-format

File signature of a DOS MZ executable and of the DOS stub at the start of every Windows PE binary. "MZ" are the initials of Mark Zbikowski, who designed the format.

Similar magic numbers

valuenamecategory
4D 56 CD Stomper Pro label file file-signature
4D 5A 90 00 03 00 00 00 Acrobat plug-in / DirectShow filter / Audition graphic filter file-signature
4D 54 68 64 MIDI sound file / Yamaha Piano file-signature
4D 52 56 4E VMware BIOS state file file-signature
4D 53 43 46 Microsoft cabinet file / OneNote Package / Powerpoint Packaged Presentation / MS Access Snapshot Viewer file file-signature