# de4dot/de4dot

.NET deobfuscator and unpacker.

Repository: https://github.com/de4dot/de4dot
Canonical: https://ross.abutalabs.com/products/de4dot
Language: C#
License: GPL-3.0
License Family: copyleft
Archived: true
Last push: 2020-08-29T08:14:56+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 35, longevity 100
- inputs: {"age_days": 5462, "days_push": 2195, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, archived
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 7437, forks 2805 (observed 2026-08-28T04:09:59.901365+00:00)

## What it is
de4dot is an open-source .NET deobfuscator and unpacker written in C# that restores packed and obfuscated .NET assemblies to near-original form. It supports many commercial obfuscators, decrypting strings, resources, and methods, removing anti-tamper code, and cleaning control flow.

## Use cases
- deobfuscate an obfuscated .NET assembly
- unpack a packed .NET executable
- decrypt strings in an obfuscated .NET app
- analyze a .NET malware sample
- remove anti-debug and tamper protection from an assembly
- convert a wrapped PE exe back to a .NET exe
- clean up spaghetti IL control flow for decompilation

## When to choose
- you need to reverse-engineer or audit an obfuscated .NET assembly
- you want to restore readable code from assemblies packed with supported obfuscators like .NET Reactor or Dotfuscator
- you do malware analysis of .NET binaries

## When to avoid
- you need to recover original symbol names - they are usually unrecoverable
- you need support or updates for the latest obfuscator versions - the project has no support and releases stopped in 2020
- you are working with non-.NET binaries

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: reverse-engineering, security, parser
- domain: reverse-engineering, security, developer-tools
- platform: windows, cli, dotnet
- tags: deobfuscator, unpacker, dotnet, il-decompilation, malware-analysis, linux, macos

## Member repositories
- de4dot/de4dot (main) score 10

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:59.901365+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 2026-08-29T17:37:42.290826+00:00, confidence not recorded.
  - readme: https://github.com/de4dot/de4dot (fetched 2026-08-28T04:09:59.901365+00:00, sha 60af0387bcee)
- Data as of 2026-08-30T08:39:29.467469+00:00.