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capa usage

See capa -h for all supported arguments and usage examples.

tips and tricks

only run selected rules

Use the -t option to run rules with the given metadata value (see the rule fields rule.meta.*). For example, capa -t [email protected] runs rules that reference Willi's email address (probably as the author), or capa -t communication runs rules with the namespace communication.

IDA Pro integrations

You can run capa from within IDA Pro. Run capa/main.py via File - Script file... (or ALT + F7). When running in IDA, capa uses IDA's disassembly and file analysis as its backend. These results may vary from the standalone version that uses vivisect. IDA's analysis is generally a bit faster and more thorough than vivisect's, so you might prefer this mode.

When run under IDA, capa supports both Python 2 and Python 3 interpreters. If you encounter issues with your specific setup, please open a new Issue.

Additionally, capa comes with an IDA Pro plugin located in the capa/ida directory: the explorer.

capa explorer

The capa explorer allows you to interactively display and browse capabilities capa identified in a binary. As you select rules or logic, capa will highlight the addresses that support its analysis conclusions. We like to use capa to help find the most interesting parts of a program, such as where the C2 mechanism might be.

capa explorer

To install the plugin, you'll need to be running IDA Pro 7.4 or 7.5 with either Python 2 or Python 3. Next make sure pip commands are run using the Python install that is configured for your IDA install:

  1. Only if running Python 2.7, run command $ pip install https://github.com/williballenthin/vivisect/zipball/master
  2. Run $ pip install . from capa root directory
  3. Open IDA and navigate to File > Script file… or Alt+F7
  4. Navigate to <capa_install_dir>\capa\ida\ and choose ida_capa_explorer.py