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Capturing the flags
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57 results for source starred repositories written in C
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A little tool to play with Windows security

C 21,227 4,031 Updated May 11, 2025

build-once run-anywhere c library

C 20,518 735 Updated Jan 25, 2026

A free Windows-compatible Operating System

C 17,010 2,034 Updated Feb 4, 2026

mimalloc is a compact general purpose allocator with excellent performance.

C 12,435 1,050 Updated Feb 3, 2026

This repo contains driver samples prepared for use with Microsoft Visual Studio and the Windows Driver Kit (WDK). It contains both Universal Windows Driver and desktop-only driver samples.

C 7,631 5,027 Updated Feb 4, 2026

tiniest x86-64-linux emulator

C 7,418 259 Updated Dec 10, 2025

The fuzzer afl++ is afl with community patches, qemu 5.1 upgrade, collision-free coverage, enhanced laf-intel & redqueen, AFLfast++ power schedules, MOpt mutators, unicorn_mode, and a lot more!

C 6,273 1,244 Updated Feb 3, 2026

UEFI firmware image viewer and editor

C 5,285 716 Updated Jan 30, 2026

Porting Windows Dynamic Link Libraries to Linux

C 4,469 392 Updated Apr 10, 2025

Checkpoint/Restore tool

C 3,671 704 Updated Jan 29, 2026

State-of-the-art native debugging tools

C 3,618 446 Updated Jan 7, 2026

Simple (relatively) things allowing you to dig a bit deeper than usual.

C 3,457 560 Updated Feb 3, 2026

Modern, advanced, portable, multiprotocol bootloader and boot manager. (Official mirror of https://codeberg.org/Limine/Limine)

C 2,778 179 Updated Feb 4, 2026

cc65 - a freeware C compiler for 6502 based systems

C 2,593 485 Updated Jan 9, 2026

Scans all running processes. Recognizes and dumps a variety of potentially malicious implants (replaced/implanted PEs, shellcodes, hooks, in-memory patches).

C 2,307 285 Updated Oct 31, 2025

Open-Source Shellcode & PE Packer

C 2,061 336 Updated Feb 3, 2024

A Linux eBPF rootkit with a backdoor, C2, library injection, execution hijacking, persistence and stealth capabilities.

C 1,936 241 Updated Apr 7, 2024

Hardened allocator designed for modern systems. It has integration into Android's Bionic libc and can be used externally with musl and glibc as a dynamic library for use on other Linux-based platfo…

C 1,725 125 Updated Jan 29, 2026

Stealthy Linux Kernel Rootkit for modern kernels (6x)

C 1,346 150 Updated Feb 2, 2026

xAnalyzer plugin for x64dbg

C 1,180 121 Updated Aug 13, 2025

Original C Implementation of the Hell's Gate VX Technique

C 1,157 132 Updated Jun 28, 2021

M*LIB is a library of generic and type safe containers / data structures in pure C language (C99 / C11) for a wide collection of container (comparable to the C++ STL).

C 1,070 90 Updated Jan 25, 2026

Portable C standard library

C 1,044 177 Updated Jan 29, 2026

PDBRipper is a utility for extract an information from PDB-files.

C 874 96 Updated Feb 3, 2026

An easy-to-use library for emulating memory dumps. Useful for malware analysis (config extraction, unpacking) and dynamic analysis in general (sandboxing).

C 853 49 Updated Feb 2, 2024

A x86 32bit Hobby Operatingsystem with graphics, multitasking, networking and 32bit C-Compiler for i386 architecture.

C 809 27 Updated Dec 25, 2025

Demos of various injection techniques found in malware

C 797 189 Updated Feb 15, 2022

Dynamic unpacker based on PE-sieve

C 796 77 Updated Sep 13, 2025

Cheat that uses a driver instead WinAPI for Reading / Writing memory.

C 760 159 Updated Jul 4, 2021

Contains all the material from the DEF CON 31 workshop "(In)direct Syscalls: A Journey from High to Low".

C 744 107 Updated May 23, 2025
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