capa v3.0 releases: identify capabilities in executable files
capa detects capabilities in executable files. You run it against a PE file or shellcode and it tells you what it thinks the program can do. For example, it might suggest that the file is a backdoor, is capable of installing services, or relies on HTTP to communicate.
- adds support for ELF files targeting Linux thanks to Intezer
- adds new features to specify OS, CPU architecture, and file format
- fixes a few bugs that may have led to false negatives (missed capabilities) in older versions
- adds 80 new rules, including 36 describing techniques for Linux
See capa -h for all supported arguments and usage examples.
tips and tricks
only run selected rules
-t option to run rules with the given metadata value (see the rule fields
rule.meta.*). For example,
capa -t firstname.lastname@example.org runs rules that reference Willi’s email address (probably as the author), or
capa -t communication runs rules with the namespace
IDA Pro integrations
You can run capa from within IDA Pro. Run
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.
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.
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:
- Only if running Python 2.7, run command
$ pip install https://github.com/williballenthin/vivisect/zipball/master
$ pip install .from capa root directory
- Open IDA and navigate to
File > Script file…or
- Navigate to
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