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.
https://www.microchip.com/webdoc/avrassembler/avrassembler.wb_instruction_list.html
Cheatsheet | Datasets
This websites provide reference documentation of the AVR instruction set, which is used for Arduino boards.
The cloud version of binary ninja allows free reversing in the cloud. It has a real-time collaboration feature.
https://github.com/ReFirmLabs/binwalk
Tools
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.
Search for CTF challenges by language or topic of the challenge.
https://gchq.github.io/CyberChef/
Tools
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.
The website provides a playable archive of old DEFCON challenges. The chanllenges are tagged by category and by original CTF.
The files are available on GitHub.
https://github.com/m57/dnsteal
DNS | Tools
dnsteal provides a fake DNS server and encodes a file into a series of DNS requests. The fake DNS server then reassembles the file. This can be used to hide the file exfiltration as DNS traffic, however, since it doesn't use the default DNS server it is quite noisy.
https://github.com/deiv/driftnet
Networks | Tools
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.
http://exif.regex.info/exif.cgi
Tools
The online Image Metadata Viewer shows the EXIF information from uploaded files or files by URL. It supports a wide range of metadata, such as XMP, EXIF, IPTC, and MakerNotes.
https://github.com/openwall/john
Hashes | Passwords | Tools
John the Ripper is 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.
Online interface to find a libc database by function offsets. They are powered by the libc-database repository.
These websites provided an overview over the Linux systemcall interface by listing the syscall numbers, their meanings, and their arguments.
https://default-password.info/
Datasets | Passwords
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.
https://defuse.ca/online-x86-assembler.htm
Tools | x86
Website allowing assembly and disassembly of x86 and x64 code.
https://onlinedisassembler.com/odaweb/
Reverse Engineering | Tools | x86
The online disassembler can disassemble a wide range of binary formats and platforms. It can disassemble free-standing bytes too. It provides a disassembly view, a graph view, a symbols and a function viewer.
These websites have access to large rainbow tables and allow quick access to known weak hashes.
https://overthewire.org/wargames/
Datasets | Tools
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.
https://github.com/OWASP/Amass
DNS | Tools
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.
https://github.com/zardus/preeny
Tools
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.
https://github.com/Ignitetechnologies/Privilege-Escalation
Datasets
The repo contains a curated list of various ways to perform privilege escalation. It is sorted by different attack vectors.
https://pwntools.readthedocs.io/en/stable/
Tools
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.
https://github.com/Ganapati/RsaCtfTool
Certificates | Tools
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.
https://npmccallum.gitlab.io/post/foreign-architecture-docker/
Docker | Tools
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.
https://github.com/kontaxis/snidump
Networks | Tools
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.
https://vulnerablecontainers.org/
Datasets | Docker
The website lists docker containers from Docker Hub with known vulnerabilities in it. The top 1000 docker containers from Docker Hub are regularly 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: