angr is a platform-agnostic binary analysis framework developed by the Computer Security Lab at UC Santa Barbara and their associated CTF team, Shellphish.
angr is a suite of python libraries that let you load a binary and do a lot of cool things to it:
- Disassembly and intermediate-representation lifting
- Program instrumentation
- Symbolic execution
- Control-flow analysis
- Data-dependency analysis
- Value-set analysis (VSA)
The most common angr operation is loading a binary: p = angr.Project('/bin/bash') If you do this in IPython, you can use tab-autocomplete to browse the top-level-accessible methods and their docstrings.
The short version of "how to install angr" is mkvirtualenv angr && pip install angr.
angr does a lot of binary analysis stuff. To get you started, here's a simple example of using symbolic execution to get a flag in a CTF challenge.
import angr
project = angr.Project("angr-doc/examples/defcamp_r100/r100", auto_load_libs=False)
@project.hook(0x400844)
def print_flag(state):
print "FLAG SHOULD BE:", state.posix.dump_fd(0)
project.terminate_execution()
project.execute()- Install Instructions
- Documentation as HTML and as a Github repository
- Dive right in: top-level-accessible methods
- Examples using angr to solve CTF challenges.
- API Reference