Zelos - A comprehensive binary emulation platform

(24 views)

Zelos (Zeropoint Emulated Lightweight Operating System) is a python-based binary emulation platform. One use of zelos is to quickly assess the dynamic behavior of binaries via command-line or python scripts. All syscalls are emulated to isolate the target binary. Linux x86_64 (32- and 64-bit), ARM and MIPS binaries are supported. Unicorn provides CPU emulation.

Full documentation is available here.

Installation

Use the package manager pip to install zelos.

pip install zelos

Basic Usage

Command-line

To emulate a binary with default options:

$ zelos my_binary

To view the instructions that are being executed, add the -v flag:

$ zelos -v my_binary

You can print only the first time each instruction is executed, rather than every execution, using --fasttrace:

$ zelos -v --fasttrace my_binary

By default, syscalls are emitted on stdout. To write syscalls to a file instead, use the --strace flag:

$ zelos --strace path/to/file my_binary

Specify any command line arguments after the binary name:

$ zelos my_binary arg1 arg2

Programmatic

import zelos

z = zelos.Zelos("my_binary")
z.start(timeout=3)

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

Please make sure to update tests as appropriate.

Local Development Environment

First, create a new python virtual environment. This will ensure no package version conflicts arise:

$ python3 -m venv ~/.venv/zelos
$ source ~/.venv/zelos/bin/activate

Now clone the repository and change into the zelos directory:

(zelos) $ git clone [email protected]:zeropointdynamics/zelos.git
(zelos) $ cd zelos

Install an editable version of zelos into the virtual environment. This makes import zelos available, and any local changes to zelos will be effective immediately:

(zelos) $ pip install -e '.[dev]'

At this point, tests should pass and documentation should build:

(zelos) $ pytest
(zelos) $ cd docs
(zelos) $ make html

Built documentation is found in docs/_build/html/.

Install zelos pre-commit hooks to ensure code style compliance:

(zelos) $ pre-commit install

In addition to automatically running every commit, you can run them anytime with:

(zelos) $ pre-commit run --all-files

Windows Development:

Commands vary slightly on Windows:

C:\> python3 -m venv zelos_venv
C:\> zelos_venv\Scripts\activate.bat
(zelos) C:\> pip install -e .[dev]

More: https://github.com/zeropointdynamics/zelos

March 16, 2020

Author

Hakin9 TEAM
Hakin9 is a monthly magazine dedicated to hacking and cybersecurity. In every edition, we try to focus on different approaches to show various techniques - defensive and offensive. This knowledge will help you understand how most popular attacks are performed and how to protect your data from them. Our tutorials, case studies and online courses will prepare you for the upcoming, potential threats in the cyber security world. We collaborate with many individuals and universities and public institutions, but also with companies such as Xento Systems, CATO Networks, EY, CIPHER Intelligence LAB, redBorder, TSG, and others.
Subscribe
Notify of
guest

This site uses Akismet to reduce spam. Learn how your comment data is processed.

0 Comments
Inline Feedbacks
View all comments
© HAKIN9 MEDIA SP. Z O.O. SP. K. 2023