Open-source alternatives to Atomic Red Team

Monkey is an adversary emulation platform and breach and attack simulation tool designed to test network defenses through automated lateral movement and exploit delivery. It functions as a network security testing system that evaluates security posture by attempting to propagate through vulnerabilities and extract sensitive system credentials. The platform distinguishes itself by simulating specific real-world attacker behaviors, such as ransomware encryption, cryptojacking, and the theft of browser-stored credentials and secure shell keys. It utilizes binary hash randomization to evade antiv

Virtual Machine for Adversary Emulation and Threat Hunting

"Security Incidents In A Box!" A modular, menu-driven, cross-platform tool for building customized, time-delayed, distributed security events. Easily create custom event chains for Blue- & Red Team drills and sensor / alert mapping. Red Teams can create decoy incidents, distractions, and lures to support and scale their operations. Build event sequences ("narratives") to simulate realistic scenarios and generate corresponding network and filesystem artifacts.

Sliver is a command and control framework designed for adversary emulation and security assessment operations. It provides a centralized platform for managing remote systems, enabling security professionals to coordinate multi-operator sessions and maintain persistent, secure communication channels across diverse network environments. The framework distinguishes itself through its focus on stealth and infrastructure flexibility. It utilizes dynamic payload obfuscation to generate unique binaries and supports in-memory execution to minimize disk artifacts. Communication is secured through mutu

This project is a standardized repository of malicious and malformed character sequences designed to stress-test data parsing and sanitization routines. It serves as a security testing corpus and a language-neutral reference for auditing software robustness against injection flaws and unexpected data handling errors across diverse platforms. The dataset functions as a benchmark for input validation, providing a curated collection of edge-case strings that allow developers to identify potential crashes and security vulnerabilities. By decoupling these test vectors from application logic, the r

Dotbot is a dotfile installation manager and environment setup automator designed to deploy configuration files from a repository to a local system. It functions as a symlink deployment utility and templated configuration engine, using a combination of symbolic links and custom directives to synchronize settings across machines. The project enables the automation of dotfile deployment through a shell-based configuration bootstrapper. It supports the synchronization of application profiles and the rendering of dynamic configuration files from templates before they are deployed to the filesyste

Tmuxinator is a configuration-driven session manager and workspace automation tool for tmux. It acts as a terminal multiplexer orchestrator that translates structured project definitions into shell commands to define and launch complex window and pane layouts. The project distinguishes itself through declarative configuration and lifecycle management. It utilizes YAML-based mapping and template-based variable injection to create reusable session configurations, while providing hook-based execution to trigger custom scripts during startup, restart, or shutdown. Its broader capabilities includ

Osmedeus is a security workflow orchestration engine that coordinates AI agents, shell commands, and scanning tools through declarative YAML pipelines. It functions as a distributed security scanner, a declarative workflow automator, and an AI agent framework for security, enabling automated multi-step security analysis with conditional branching, parallel execution, and distributed workers. The engine distinguishes itself through a hybrid runner model that executes workflow steps on the local host, inside Docker containers, or over SSH to remote machines, selected per step or module. It supp

Automated Attack Simulation in the Cloud, complete with detection use cases.

This project is a collection of technical resources, blueprints, and guides for building resilient and stealthy red team infrastructure. It provides a comprehensive framework for designing offensive security environments that resist detection and remain operational throughout security engagements. The repository distinguishes itself through detailed playbooks for adversary simulation and hardening manuals. It covers advanced obfuscation techniques such as domain fronting, the use of platform-as-a-service redirectors, and the leveraging of third-party content sites to inherit domain reputation

This project provides secure, containerized infrastructure designed for autonomous agents, remote code execution, and cloud development. It functions as a sandboxed environment where AI agents and external processes can execute code, run shell commands, and manage files while remaining isolated from the host system. The system distinguishes itself by implementing the Model Context Protocol, allowing it to act as a standardized tool server that exposes browser and filesystem capabilities to compatible clients. It further integrates headless browser automation, enabling programmatic web navigat

DesktopCommanderMCP is a Model Context Protocol (MCP) server that gives AI agents direct access to local files, shell commands, and system processes through natural language instructions. It acts as a unified bridge between conversational commands and desktop operations, enabling an AI to translate plain English into file management, code editing, system command execution, data analysis, and software scaffolding tasks without needing its own API. The server exposes these capabilities as structured tools via the MCP protocol, so any compatible agent can interact with the local environment in a

This project is a parallel test runner and shell command executor designed to reduce total runtime by executing test suites across multiple CPU cores. It functions as a test suite load balancer and a CI test process manager that coordinates global setup, teardown, and exit codes for continuous integration pipelines. The tool acts as a test database orchestrator by creating and managing unique database instances mapped to parallel processes, which prevents data collisions. It distributes tests into balanced groups based on file size or recorded runtimes to optimize execution time and avoid bot

PentestGPT is an autonomous security testing framework that leverages large language models to plan, execute, and coordinate end-to-end penetration testing engagements. By functioning as an autonomous agent, the system automates the entire testing lifecycle, from initial reconnaissance and vulnerability analysis to the generation of custom exploits and the execution of post-exploitation tasks. The platform distinguishes itself through a multi-agent orchestration system that coordinates specialized AI agents to collaborate on complex, multi-stage attack chains. It integrates multimodal context

ZenML is an extensible machine learning orchestration framework designed to manage the end-to-end lifecycle of data pipelines and AI agent workflows. It functions as a durable orchestrator that executes machine learning tasks as directed acyclic graphs, ensuring that every step is containerized for consistent performance across local, cloud, and hybrid infrastructure. By decoupling pipeline code from underlying compute and storage backends, the platform allows developers to define infrastructure-agnostic stacks that remain portable across diverse environments. The project distinguishes itself

This project is a command-line utility and Python-based scraper designed to download and archive educational media from Coursera for offline access. It functions as a tool for saving course syllabi, videos, subtitles, and notebooks to a local file system to ensure a secure backup of academic materials. The tool distinguishes itself by providing capabilities for course quiz extraction, retrieving questions and answers from both graded and ungraded quizzes. It supports the retrieval of learning materials from both legacy and on-demand platforms and implements interrupted download resumption to

hacker-scripts is a multi-purpose toolkit comprising a security vulnerability testing suite, a keyword-driven email automator, and a TCP remote hardware controller. It provides a collection of scripts for identifying security weaknesses and conducting controlled hacking experiments across multiple programming language environments. The system automates email workflows by scanning headers and bodies for specific strings to trigger server responses and sends randomized text and email alerts based on system activity. It also enables remote hardware control by sending binary commands over network

Mythic is a red teaming framework and command and control server designed for managing post-exploitation activities. It provides a centralized system for issuing tasks and receiving telemetry from agents deployed across diverse target platforms and operating systems. The platform features a collaborative operator interface that allows multiple security researchers to coordinate operations and track target activity within a shared environment. It supports the deployment and updating of diverse agent payloads through a multi-platform payload manager. The framework utilizes a plugin-based archi

Semgrep is a static analysis security testing tool designed to identify vulnerabilities and logic errors by matching source code against declarative patterns. It functions as an automated scanner that integrates into development workflows to detect insecure code patterns and enforce coding standards before deployment. The engine utilizes a language-agnostic intermediate representation and a modular parser architecture to normalize diverse programming languages into a unified format. This allows for consistent rule execution across different codebases, enabling users to perform custom structur

Fuzzing101 is an educational resource providing a structured curriculum and containerized security labs for learning software fuzzing and vulnerability research. It functions as a training course that guides users through the process of identifying security flaws using systematic input manipulation and memory corruption analysis. The project distinguishes itself by providing isolated environments that ensure consistent build dependencies for practicing software instrumentation and crash triaging. It includes a practical tutorial on using evolutionary fuzzing engines and instrumentation tools

ThreatHunter-Playbook is a threat hunting playbook framework and detection engineering workflow designed to standardize the security detection lifecycle. It functions as a community-driven repository for adversary tradecraft and detection logic, using interactive notebooks to combine technical documentation with executable analytics. The project provides a validation suite for testing security hypotheses against pre-recorded telemetry datasets. This ensures that detection logic is verified in local or cloud environments before being deployed to production. The framework covers security detec

OneListForAll is a wordlist aggregation pipeline and automated dictionary publisher designed for web security assessments. It collects, cleans, and merges multiple remote text repositories to create curated sets of paths, parameters, and credentials used in web fuzzing and vulnerability discovery. The project functions as a text data deduplication tool that filters noise and eliminates redundant entries using regular expressions and priority rules. It automates the end-to-end process of packaging these processed lists into compressed archives with cryptographic checksums and publishing them t

LOLBAS is a curated database and knowledge base of signed Windows binaries that can be misused to bypass security restrictions and execute unauthorized code. It serves as a technical registry that maps trusted system files to their functional capabilities and the offensive tactics they enable. The project distinguishes itself by providing a capability-driven indexing system and a tactics registry that relates legitimate binary functionality to known security evasion techniques. It includes an association layer that links specific system binaries to attack patterns and tactical objectives, pro