# quasar/Quasar

Remote Administration Tool for Windows

Repository: https://github.com/quasar/Quasar
Canonical: https://ross.abutalabs.com/products/quasar
Language: C#
License: MIT
License Family: permissive
Topics: rat, remote, administration, net, c-sharp, mono, windows, security, remote-desktop, remote-control, protobuf, dotnet, red-team
Archived: true
Last push: 2024-02-29T06:37:37+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 4439, "days_push": 916, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 9908, forks 2649 (observed 2026-08-28T04:10:38.757334+00:00)

## What it is
Quasar is a free, open-source remote administration tool (RAT) for Windows written in C#, offering remote desktop, shell, file management, and monitoring features over encrypted TLS connections. It is intended for legitimate system administration, user support, and red-team use.

## Use cases
- remotely administer windows machines
- remote desktop control of a pc
- monitor employee workstations
- red team command and control testing
- remote file management and shell access
- recover saved browser passwords from managed machines

## When to choose
- you need a free self-hosted remote administration tool for windows
- you want encrypted remote desktop, shell, and file access in one gui
- you are doing authorized red-team or security research on windows endpoints

## When to avoid
- you need cross-platform administration beyond windows
- you want a tool without dual-use abuse potential for production environments
- you need a supported enterprise-grade remote management product

## Facets
- artifact type: application
- maturity: maintenance
- function: security, networking, gui, logging
- domain: security, windows, developer-tools, penetration-testing
- platform: windows, dotnet
- tags: rat, remote-administration, remote-control, red-team, csharp, keylogger, reverse-proxy, tls-encryption, remote-desktop, desktop

## Member repositories
- quasar/Quasar (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:38.757334+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 2026-08-29T17:20:19.670129+00:00, confidence not recorded.
  - readme: https://github.com/quasar/Quasar (fetched 2026-08-28T04:10:38.757334+00:00, sha c55bbc40d79d)
- Data as of 2026-08-30T08:39:29.467469+00:00.