Writing assembly is fun. Assembly is the lowest language (humanly understandable) available to communicate with computers, and is crucial to understand the internal mechanisms of any machine. Unfortunately, setting up an environment to write, compile and run assembly for various architectures (x86, ARM, MIPS, SPARC) has always been painful. CEmu is an attempt to fix this by providing a bundled GUI application that empowers users to write assembly and test it by compiling it to bytecode and executing it in an QEMU-based emulator.
Cheap EMUlator combines all the advantages of a basic assembly IDE, compilation and execution environment, by relying on the great libraries Keystone, Unicorn and Capstone engines in a Qt powered GUI.
It allows to test binary samples, check your shellcodes or even simply learn how to write assembly code, all of this for the following architectures:
- x86-32 / x86-64
- Arm / AArch64
- MIPS / MIPS64
- SPARC / SPARC64
- (more to come)
CEmu
was tested and works on Linux, Windows and MacOSX.
Notes:
- if you are using Kali Linux, there is a known problem with the installation of the
keystone-engine
package using PIP. A quick'n dirty fix for that would be (asroot
):
$ sudo updatedb
$ sudo locate libkeystone.so
$ sudo ln -sf /path/to/libkeystone.so/found/above /usr/local/lib/libkeystone.so
- if you are using OSX, there is also a known issue when installing
capstone-engine
from PIP, resulting in the.dylib
not being deployed at the right location. A quick fix for it is
# locate the shared lib
$ find ~ -type f -name libcapstone.dylib
# link it in a valid correct library path
$ ln -sf /path/to/libcapstone.dylib/found/above /usr/local/Cellar/python3/3.6.2/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/capstone/libcapstone.dylib
This is the recommended way to install cemu
as it will work out of the box. You can install cemu
on your system or using virtualenv
or pipenv
, by running:
pip3 install --user --upgrade cemu
git clone https://github.com/hugsy/cemu && cd cemu
pip3 install --user --upgrade .
If for some reason the installation via PIP fails, you can always run cemu
by installing manually the following dependencies:
unicorn
and its Python bindings, as the emulation enginekeystone
and its Python bindings, as the assembly enginecapstone
and its Python bindings, as the disassembly enginePyQt5
for the GUIpygments
for the text colorization
Use the script requirements.sh
to install all the dependencies required for cemu
.
Since some packages can be installed via your package manager, the script may ask for your root password if required.
$ ./requirements.sh
By default, the script will install the dependencies to have cemu
running with Python3. If you prefer to use Python2, simply add --python2
to the command line, like this:
$ ./requirements.sh --python2
The fastest way for Windows is to install the packaged binaries for: * Keystone (http://www.keystone-engine.org/download/) * Capstone (http://www.capstone-engine.org/download) * Unicorn (http://www.unicorn-engine.org/download/)
Then spawn cmd.exe
and install the missing Python packages: python-qt5
, pygments
).
C:>pip.exe install python-qt5 pygments
If you are running Python2, you will also need to install the package enum34
.
`OpenREIL
<https://github.com/Cr4sh/openreil>__ is an Open Source library created by [@Cr4sh](https://twitter.com/@d_olex) that implements a translator and tools for generating Intermediate Language level code (REIL). OpenREIL library can be used optionally with cemu`. The Current version of OpenREIL only provides support for x86 (Intel) architecture.
If you use cemu
with Python 2.7, you can also use `OpenReil
<https://github.com/Cr4sh/openreil>__ to generate IR code based on the content of the Code` panel.
To do so, follow the installation procedure for OpenReil
by following the steps here.
cemu
was created and maintained by myself, `@_hugsy_
<https://twitter.com/_hugsy_>__, but kept fresh thanks to `all the contributors <https://github.com/hugsy/cemu/graphs/contributors>__.