Skip to content

Instantly share code, notes, and snippets.

View ZetaTwo's full-sized avatar

Calle Svensson ZetaTwo

View GitHub Profile
@ZetaTwo
ZetaTwo / Hack-a-Sat 2021 Qualifiers - Mars or Bust: Write-up.md
Created July 20, 2021 18:10
Hack-a-Sat 2021 Qualifiers - Mars or Bust: Write-up

Hack-a-Sat 2021 Qualifiers - Mars or Bust: Write-up

We are provided with a website where you can download a rom file and submit a rom file to be run in a simulator. The simulator runs the provided firmware to perform a mars landing through several stages. The unmodified firmware works fine until the point where the lander has about 40 meters remaining at which point it shuts down the engine and crashes to the surface. The goal is to patch the firmware and perform a correct landing.

Looking at the firmware we see that it is MIPS 32-bit little endian code. We try to open it in Binary Ninja and disassemble the code at address 0x0. This turns out to be a jump to 0xfc00400 which suggests that 0xfc00400 so we re-open the firmware with the new base address and try to disassemble again which gives a somewhat better result. However, looking further through the code we can find the initialization routine which, among other things, copies data from 0xbfc05efc to an address which probably is RAM. This suggests

@ZetaTwo
ZetaTwo / vm-setup.sh
Last active March 23, 2019 22:26
Setup new hacking VM
#!/bin/sh
mkdir ~/tools
sudo apt-get install -y git zsh terminator fonts-powerline volatility nmap python-lzma audacity zbar-tools gdb wireshark tshark socat graphviz sqlmap ruby ruby-dev gimp libcapstone3 python python3 python-pip python3-pip sagemath clang
sudo dpkg -i code_1.32.3-1552606978_amd64.deb google-chrome-stable_current_amd64.deb
# Config
git config --global user.email "calle.svensson@zeta-two.com"
git config --global user.name "Calle Svensson"
@ZetaTwo
ZetaTwo / tools.md
Last active July 23, 2024 21:11
CTF/Hacking tools - Tools I use for security related work

General purpose

Terminator - Terminal emulator
zsh - My shell of choice prezto - Configuration management for zsh

Editors

010 Editor - Hex editor
VSCode - Text editor

Low-level reversing

@ZetaTwo
ZetaTwo / IDA Pro on Ubuntu 16
Last active September 10, 2020 09:47
Outdated instructions on how to install an old version of IDA Pro on Ubuntu 16
# Note: These instructions are outdated and no longer relevant
ln -s /tmp /usr/tmp
ln -s /lib64/ld-linux-x86-64.so.2 /lib64/ld-lsb-x86-64.so.3
dpkg --add-architecture i386
apt-get install libglib2.0-0:i386 gtk2-engines:i386 gtk2-engines-murrine:i386 gtk2-engines-pixbuf:i386
@ZetaTwo
ZetaTwo / gdb-python2.7-ubuntu.sh
Last active August 29, 2015 14:22 — forked from zachriggle/gdb-python2.7-ubuntu.sh
Compile GDB with Python 2 for Peda
apt-get install python2.7-dev python2.7
apt-get build-dep gdb
apt-get source gdb
cd gdb-7.9
sed -i -E "s|python3|/usr/bin/python2.7|" debian/rules
dpkg-buildpackage -uc -us -j8
dpkg-install ../*.deb
### Keybase proof
I hereby claim:
* I am zetatwo on github.
* I am zetatwo (https://keybase.io/zetatwo) on keybase.
* I have a public key whose fingerprint is F6CB E0F3 1205 0A3D 6BCB CD6B 75D2 34C0 443D 9046
To claim this, I am signing this object: