# 49 53 63 28 — File format magic numbers

For 49 53 63 28, offset is 0; extension is cab; format is InstallShield CAB Archive File, recorded from its source on 2026-08-03.

- **Hex signature:** 49 53 63 28 _(unconfirmed — we could not tie this to the quote below)_
- **Offset:** 0 _(unconfirmed — we could not tie this to the quote below)_
- **Extension:** cab
- **Format:** InstallShield CAB Archive File

## What the source says

> cab | <https://en.wikipedia.org/wiki/InstallShield> InstallShield CAB Archive File

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-08-03. Review by: 2027-08-03.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).