# brandonlw/Psychson

Phison 2251-03 (2303) Custom Firmware & Existing Firmware Patches (BadUSB)

Repository: https://github.com/brandonlw/Psychson
Canonical: https://ross.abutalabs.com/products/psychson
Language: C#
License: MIT
License Family: permissive
Last push: 2021-07-19T01:02:37+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4359, "days_push": 1872, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 4181, forks 1240 (observed 2026-08-28T04:08:38.386534+00:00)

## What it is
A toolkit for creating custom firmware and firmware patches for Phison 2251-03 (2303) USB controller chips, enabling BadUSB attacks via HID payload injection. It includes C# PC tools (DriveCom, EmbedPayload, Injector) for dumping and flashing drive firmware, plus 8051 firmware/patch code written in C.

## Use cases
- dump firmware from a Phison USB flash drive
- flash custom firmware onto a Phison 2251-03 controller
- embed Rubber Ducky HID payloads into USB drive firmware
- build a BadUSB device from a supported flash drive
- patch existing Phison firmware with custom 8051 code

## When to choose
- you need to research or demonstrate BadUSB attacks on Phison PS2251-03 drives
- you want to flash custom HID-payload firmware onto a supported USB drive
- you are doing USB firmware security research on 8051-based controllers

## When to avoid
- your USB drive does not use a Phison 2251-03 controller or the tested firmware version 1.03.53
- you cannot risk permanently bricking the device
- you want a plug-and-play BadUSB tool rather than firmware-level research tooling

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: security, embedded, developer-tools
- domain: security, hardware, embedded-systems
- platform: windows, cross-platform
- tags: badusb, phison, usb-firmware, hid-payload, 8051, rubber-ducky, hardware-hacking

## Member repositories
- brandonlw/Psychson (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:38.386534+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:22:39.711829+00:00, confidence not recorded.
  - readme: https://github.com/brandonlw/Psychson (fetched 2026-08-28T04:08:38.386534+00:00, sha 9c37c3d8a215)
- Data as of 2026-08-30T08:39:29.467469+00:00.