Alex M0nteCarl0

WARNING

THIS GIST IS EXTREMELY OBSOLETE. DO NOT FOLLOW THESE INSTRUCTIONS. SERIOUSLY.

IF YOU IGNORE THE ABOVE WARNING, YOU AGREE IN ADVANCE THAT YOU DIDN'T GET THESE INSTRUCTIONS FROM ME, THAT I WARNED YOU, AND THAT I RESERVE THE RIGHT TO POINT AND LAUGH MOCKINGLY IF AND WHEN SOMETHING BREAKS HORRIBLY.

I'll do a write-up of current custom-kernel procedures over on Random Bytes ( https://randombytes.substack.com/ ) one day soon.

NOTE

Backup android app, data included, no root needed, with adb

Note: This gist may be outdated, thanks to all contributors in comments.

adb is the Android CLI tool with which you can interact with your android device, from your PC

You must enable developer mode (tap 7 times on the build version in parameters) and install adb on your PC.

Don't hesitate to read comments, there is useful tips, thanks guys for this !

IDAPython cheatsheet

Important links

Basic commands

Get informations on the binary

IDAPython CTREE

Important links

Description

The CTREE is built from the optimized microcode (maturity at CMAT_FINAL), it represents an AST-like tree with C statements and expressions. It can be printed as C code.

Disassemble and Modify an Binary To Change a Function

In this gist I show how to disassemble and modify a Linux executable binary to change the body of a function. This will allow you to control how a binary behaves, even when you don't have access to the source code and you can't recompile it.

In my case, I was asked to try and bypass the protection mechanism implemented. The protection mechanism implemented was meant to only allow a binary to be run in presence of a valid license.

So basically my activity involved:

Finding the function which performs the protection check
Disassembling the binary

Command:

$ fastboot help

Output:

usage: fastboot [OPTION...] COMMAND...

flashing:

	"""Simple demonstration of using ZMQ's Curve authentication.

	This demo is adapted from the examples given in the `PyZMQ repository`__. Key
	differences include:

	* Using ``setsockopt`` to set Curve parameters instead of setting attributes
	directly (help out your IDE!)
	* Integration with ``asyncio``

	__ https://github.com/zeromq/pyzmq/tree/master/examples

	pkg install golang

	pkg install neovim

	pkg install nodejs

	curl -fLo ~/.local/share/nvim/site/autoload/plug.vim --create-dirs \
	https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

	curl -fLo ~/.vim/autoload/plug.vim --create-dirs https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

	from idaapi import PluginForm
	from PyQt5 import QtCore, QtGui, QtWidgets
	import sip

	class MyPluginFormClass(PluginForm):
	def OnCreate(self, form):
	"""
	Called when the widget is created
	"""

	// Add PNG Image Watermark on an Image using C#
	using (Watermarker watermarker = new Watermarker("filePath/image.png"))
	{
	using (ImageWatermark watermark = new ImageWatermark("filePath/watermarkLogo.png"))
	{
	// Set Watermark Properties
	watermark.X = 20;
	watermark.Y = 80;
	// Add watermark on image file and save the output
	watermarker.Add(watermark);