Best InvalidSign Alternatives & Competitors in 2026

WebDAV Covert Channel

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

Core Security Outflank Security Tooling

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

Havoc Framework

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

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.

Macro_Pack

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

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.

SourcePoint

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

TikiTorch

TikiTorch is a process injection tool that executes code within the address space of other processes using various injection techniques.

Ultimate AppLocker Bypass List

A repository documenting AppLocker bypass techniques with verified methods, legacy DLL execution approaches, and a PowerShell module for identifying AppLocker weaknesses.

Core Security Cobalt Strike

Post-exploitation threat emulation platform for red team operations.

Core Security Bundles and Suites

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

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.

C2concealer

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

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.

Darkarmour

Darkarmour is an open-source Windows antivirus evasion framework that enables security professionals to bypass antivirus detection through customizable obfuscation and anti-analysis techniques.

Inceptor

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

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.

Mystikal

A macOS Initial Access Payload Generator for penetration testing and red teaming exercises.

PoshC2

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

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.

ScareCrow

A payload creation framework designed to bypass Endpoint Detection and Response (EDR) systems.

Skyhook

Skyhook is an HTTP-based file transfer tool that uses obfuscation techniques to evade detection by Intrusion Detection Systems.

XlsGen

A proof-of-concept tool that generates Excel BIFF8 files with embedded 4.0 macros programmatically without requiring Microsoft Excel installation.

fexecve harness

A collection of tools that execute programs directly in memory using various delivery methods including URL downloads and netcat connections.

Saruman v0.1

A proof-of-concept executable injection tool that compiles and launches parasitic executables within target processes using standard or stealth injection techniques.

SharpShooter

A payload creation framework for generating and executing C# code payloads with anti-evasion capabilities for offensive security operations.

Mod_Rewrite for Red Team Infrastructure

A powerful tool for hiding the true location of your Teamserver, evading detection from Incident Response, redirecting users, blocking specific IP addresses, and managing Malleable C2 traffic in Red Team engagements.

SigThief

SigThief extracts digital signatures from signed PE files and appends them to other files to create invalid signatures for testing Anti-Virus detection mechanisms.

tryharder

A C++ staged shellcode loader with evasion capabilities, compatible with Sliver and other shellcode sources, designed for offensive security testing.

Fortra Cobalt Strike

Threat emulation tool for adversary simulations and red team operations

GoSecure Titan® Adversarial Simulation

Human-led adversary emulation service testing detection & response capabilities

Dreadnode Offensive Security Agents

AI agent platform for automating offensive security operations and evals.

REDLattice

AI-assisted vulnerability research and advanced offensive cyber tooling firm.

Red Specter Cheatsheet

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

A Security

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

KinoSec Hades

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

HexStrike AI MCP Agents

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

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.

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.

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.

C3

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