Best external_c2 framework Alternatives & Competitors in 2026

SILENTTRINITY

SILENTTRINITY is a Python-based, asynchronous C2 framework that uses .NET scripting languages for post-exploitation activities without relying on PowerShell.

Fortra Cobalt Strike

Threat emulation tool for adversary simulations and red team operations

Core Security Cobalt Strike

Post-exploitation threat emulation platform for red team operations.

Core Security Outflank Security Tooling

Red team toolkit for EDR evasion, initial access, and post-exploitation.

Dreadnode Offensive Security Agents

AI agent platform for automating offensive security operations and evals.

Red Specter Cheatsheet

CLI cheatsheet for Red Specter's 30-tool offensive security platform.

KinoSec Hades

Autonomous AI offensive cyber platform for sovereign-grade threat neutralization.

Havoc Framework

Open-source C2 framework for red team ops and adversary simulation.

MITRE Caldera™

MITRE Caldera™ is an automated adversary emulation platform built on the MITRE ATT&CK framework that supports red team operations and incident response activities through a modular C2 server and plugin architecture.

WebDAV Covert Channel

A covert channel technique that uses WebDAV protocol features to deliver malicious payloads and establish C2 communication while bypassing security controls.

pybof

PyBOF is a Python library that enables in-memory loading and execution of Beacon Object Files (BOFs) with support for argument passing and function targeting.

AzureC2Relay

An Azure Function that validates and relays Cobalt Strike beacon traffic based on Malleable C2 profile authentication.

Brute Ratel C4

Advanced command and control tool for red teaming and adversary simulation with extensive features and evasion capabilities.

C2concealer

A command line tool that generates randomized malleable C2 profiles for Cobalt Strike to vary command and control communication patterns.

C3

C3 is a framework by WithSecureLabs for rapid prototyping of custom command and control channels that integrates with existing offensive security toolkits.

CobaltBus

CobaltBus integrates Cobalt Strike with Azure Service Bus to create covert C2 communication channels for red team operations.

Covenant

Covenant is a collaborative .NET command and control framework designed for red team operations and offensive security engagements.

CrossC2

CrossC2 is a cross-platform payload generator that extends CobaltStrike's capabilities to Linux and macOS environments for red team operations.

Domain Hunter

A reconnaissance tool that analyzes expired domains for categorization, reputation, and Archive.org history to identify candidates suitable for phishing and C2 operations.

Koadic

A COM Command & Control framework that uses JScript to provide fileless remote access capabilities on Windows systems through a modular plugin architecture.

Merlin

A cross-platform HTTP/2 Command & Control framework written in Golang for post-exploitation activities and remote system management.

NimPlant

A lightweight Command and Control (C2) implant written in Nim that provides remote access capabilities for penetration testing and red team operations.

PoshC2

A proxy aware C2 framework for penetration testing, red teaming, post-exploitation, and lateral movement with modular format and highly configurable payloads.

Pupy

Pupy is an open-source, cross-platform C2 framework that provides remote access and control capabilities for compromised systems across Windows, Linux, OSX, and Android platforms.

RedGuard

RedGuard is a C2 front flow control tool that helps evade detection by security systems through traffic filtering and redirection capabilities.

RedWarden

RedWarden is a Cobalt Strike C2 reverse proxy that uses packet inspection and malleable profile correlation to evade detection by security controls during red team operations.

SharpC2

SharpC2 is a C#-based Command and Control framework that provides remote access capabilities for penetration testing and red team operations.

SourcePoint

SourcePoint generates customizable C2 profiles for Cobalt Strike servers to enhance evasion capabilities against security defenses.

Kubesploit

A cross-platform post-exploitation HTTP/2 Command & Control framework designed specifically for testing and exploiting containerized environments including Docker and Kubernetes.

Empire Communication Profiles

Customize Empire's GET request URIs, user agent, and headers for evading detection and masquerading as other applications.

Randomized Malleable C2 Profiles Made Easy

Tool for randomizing Cobalt Strike Malleable C2 profiles to evade static, signature-based detection controls.

GoSecure Titan® Adversarial Simulation

Human-led adversary emulation service testing detection & response capabilities

Core Security Bundles and Suites

Bundled offensive security suites combining pen testing, red teaming, and VM.

A Security

Autonomous offensive security platform that finds, validates, and remediates attack paths.

HexStrike AI MCP Agents

MCP server enabling AI agents to autonomously run 150+ security tools

Cobalt Strike's ExternalC2 framework

A specification/framework for extending default C2 communication channels in Cobalt Strike

xargs

A command that builds and executes command lines from standard input, allowing for the execution of commands with multiple arguments.

AggressiveProxy

Tool for enumerating proxy configurations and generating CobaltStrike-compatible shellcode.

RedELK

RedELK is a SIEM tool designed for red teams to monitor and receive alerts about blue team detection activities during penetration testing engagements.

EvilClippy

EvilClippy is a cross-platform tool that creates malicious MS Office documents with hidden VBA macros and evasion techniques for penetration testing and red team operations.

Inceptor

A template-driven framework for creating custom evasion techniques to test Anti-Virus and EDR detection capabilities.

InlineWhispers

A tool for working with Direct System Calls in Cobalt Strike's Beacon Object Files (BOF) for offensive security purposes.

InvisibilityCloak

InvisibilityCloak is a proof-of-concept C# code obfuscation toolkit designed for red teaming and penetration testing to conceal post-exploitation tools from detection.

Ivy

Ivy is a payload creation framework for executing arbitrary VBA source code directly in memory, utilizing programmatical access to load, decrypt, and execute shellcode.

Macro_Pack

Macro_Pack automates the generation and obfuscation of Office documents and scripts for penetration testing and security assessments.

Modlishka

Modlishka is a reverse proxy tool for intercepting and manipulating HTTP traffic, ideal for penetration testers, security researchers, and developers to analyze and test web applications.

Mortar

Mortar is an evasion technique to defeat and divert detection and prevention of security products, including AV, EDR, and XDR solutions.

MSBuildAPICaller

MSBuildAPICaller is an offensive security tool that enables interaction with the MSBuild API to execute arbitrary scripts for red teaming and penetration testing purposes.