angr is a python framework for analyzing binaries. It combines both static and dynamic symbolic ("concolic") analysis, making it applicable to a variety of tasks.
This websites provide reference documentation of the AVR instruction set, which is used for Arduino boards.
Binwalk is a binary file analysis tool. It works by traversing a file and looking for potentially embedded files. These embedded files can also be extraced.
The CyberChef is a website which provides many recipes and makes it easy to combine them. The recipes are small input/output steps, similar to UNIX tools, and cover a large area of topics, like data formats, encoding, encryption, networking, hashing, compression, etc. The main use case is making it easier in CTFs to chain simple operations together like processing encoded text.
Debin is a tool to predict the debug information of stripped binaries. It only works relyable with C programs, as this is the only dataset it was trained on. It might be useful to use the website for jeopardy CTFs.
Driftnet watches network traffic, and picks out and displays JPEG and GIF images for display.
Ghidra software reverse engineering (SRE) framework and IDA Pro alternative.
The Godbolt compiler explorer allows the user to compile a function and see the corresponding assembly code. It can highlight matching parts in the language and assembly, making it easy to understand how individual expressions are compiled. It supports common languages like C, C++, Go, Rust. It can also work with assembler and LLVM IR.
Another nice feature is, that it can show statistics about assembler code, like needed cycles, instructions, and which resources the instructions need. This uses the LLVM Machine Code Analyzer.
John the Ripper the THE tool to brute force passwords and password hashes. It is very fast in calculating hashes with support of GPU acceleration and supports a wide range of different hash formats.
These websites provided an overview over the Linux systemcall interface by listing the syscall numbers, their meanings, and their arguments.
The website features a large list of default passwords found in routers and IoT devices. The data is sorted by manufacturer and can be searched.
Over The Wire provides with the wargames many different challenges, to learn exploitations of different things. There are different wargames based on skill and required tooling. In each level the user has to retrieve a flag to procede to the next level.
The OWASP Amass tool suite obtains subdomain names by scraping data sources, recursive brute forcing, crawling web archives, permuting/altering names and reverse DNS sweeping. Additionally, Amass uses the IP addresses obtained during resolution to discover associated netblocks and ASNs. All the information is then used to build maps of the target networks.
preeny helps pwning binaries by disabling many annoying functions such as random or alarm.
It does so by providing different LDPRELOAD-able libraries for those library functions.
The repo contains a curated list of various ways to perform privilege escalation. It is sorted by different attack vectors.
pwntools is one of THE Python tools needed during a CTF. It is useful for both jeopardy and attack-defense CTFs. It provides common abstractions, like connecting to a local or remote program and simplifying I/O. Addtionally, it provides helpers for many exploitation techniques, such as ROP, shellcode, and leaking memory.
The RsaCtfTool is a tool supporting working with RSA keys. The main focus lies in a wide range of known attacks which are implemented and easy to use with it. This makes it suitable for CTFs, especially Jeopardies.
Sometimes it is necessary to run Docker containers for a different CPU architecture.
This Docker containers makes it possible to run other Docker containers with a different architecture.
It works by using binfmt_misc, a Linux kernel feature to run files with interpreters, and installs qemu binaries for different architectures.
This is a tcpdump-like program for printing TLS SNI and HTTP/1.1 Host fields in live or captured traffic.
The website offers a large variety of crypto implementations which can be tested. It is helpful to solve unknown crypto challenges during CTFs. It is similar in concept to the CyberChef, but only for crypto.
The website lists docker containers from Docker Hub with known vulnerabilities in it. The top 1000 docker containers from Docker Hub are regurarly scanned with Trivy and the results reported here.
A similar tool to scan for vulnerable containers is Clair scanner.
These websites provide reference documentation of the x86 instruction set: