Case study

xperia-firmware-toolkit: Xperia Companion and firmware-delivery findings

xperia-firmware-toolkit documents how Xperia Companion stores and downloads Sony Xperia firmware. Its investigation covers the app's Java/OSGi bundles, the ESS API request sequence and the SIN boot-image layout. PowerShell scripts capture firmware downloaded by Companion, and a separate guide covers Xperia 1 IV rooting and data migration.

Targets: App · Firmware · Protocol
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C2 code & docs, no demo or download

Stars: 0
Last commit: 2026-10-24
Language: JavaScript
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Observed: Code and documentation observed; no download method or demo found.
Checked: 2026-11-08

How evidence classes are assigned

Requirements & limits

Prerequisites: The documented Windows scripts use PowerShell on Windows 10 or 11; firmware capture requires Xperia Companion, while device migration and rooting steps use Android platform-tools.
Scope: The rooting workflow targets Xperia 1 IV XQ-CT72 / PDX223 and requires bootloader unlocking, which wipes the device and revokes DRM keys.
License: MIT license.

Cite

BibTeX

@misc{xperia-firmware-toolkit-case,
  title = {{xperia-firmware-toolkit: Xperia Companion and firmware-delivery findings}},
  howpublished = {\url{https://github.com/nsozturk/xperia-firmware-toolkit}},
  url = {https://github.com/nsozturk/xperia-firmware-toolkit},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/xperia-firmware-toolkit-case/}}
}

Plain text

xperia-firmware-toolkit: Xperia Companion and firmware-delivery findings. https://github.com/nsozturk/xperia-firmware-toolkit (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/xperia-firmware-toolkit-case/

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About this entry

The description was reviewed against primary sources.

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Primary sources

docs/xperia-companion-reverse-engineering.md GitHub · nsozturk/xperia-firmware-toolkit · Revision f187460
README.md GitHub · nsozturk/xperia-firmware-toolkit · Revision f187460
RELEASE_NOTES.md GitHub · nsozturk/xperia-firmware-toolkit · Revision f187460