# mandiant/speakeasy

Windows kernel and user mode emulation.

Repository: https://github.com/mandiant/speakeasy
Canonical: https://ross.abutalabs.com/products/mandiant-speakeasy
Language: Python
License: MIT
License Family: permissive
Topics: malware-analysis, emulation
Last push: 2026-08-13T16:00:11+00:00

## Health v2 (maintenance only)
Score: 91/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 97, release rhythm 78, longevity 100
- inputs: {"age_days": 2218, "days_push": 20, "days_rel": 147, "gap_med": 14.5, "n_releases_24m": 5}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2036, forks 287 (observed 2026-08-28T04:06:08.106255+00:00)

## What it is
Speakeasy is a Windows user-mode and kernel-mode emulation framework that runs binaries, drivers, and shellcode inside a modeled Windows runtime instead of a full VM. It can be driven via a CLI for fast triage or embedded as a Python library, producing structured JSON reports of API, filesystem, registry, and network activity.

## Use cases
- emulate windows malware samples without a vm
- analyze malicious shellcode behavior safely
- triage suspicious dlls and drivers quickly
- trace api calls made by a windows binary
- generate  reports of malware execution
- reverse engineer windows kernel rootkit drivers

## When to choose
- you need fast, scriptable windows binary emulation without spinning up a VM
- you want structured JSON reports of API, filesystem, registry, and network activity
- you want to embed emulation into a Python analysis pipeline
- you need to emulate both user-mode binaries and kernel drivers

## When to avoid
- you need full fidelity execution of complex software that depends on unmodeled Windows internals
- you need dynamic analysis of non-Windows binaries
- you want a turnkey sandbox with a GUI rather than a programmable framework

## Facets
- artifact type: framework
- maturity: active
- function: simulation, security, reverse-engineering, cli, sdk
- domain: security, reverse-engineering, windows
- platform: python, cross-platform, cli
- tags: emulation, malware-analysis, windows-kernel, sandbox, binary-analysis

## Member repositories
- mandiant/speakeasy (main) score 91

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:08.106255+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 2026-08-30T02:59:20.334391+00:00, confidence not recorded.
  - readme: https://github.com/mandiant/speakeasy (fetched 2026-08-28T04:06:08.106255+00:00, sha 6d98fd8cdbd6)
- Data as of 2026-08-30T08:39:29.467469+00:00.