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Match STIX content against STIX patterns

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This is an OASIS TC Open Repository. See the Governance section for more information.

The pattern-matcher is a prototype software tool for matching STIX Observed Data content against patterns used in STIX Indicators. The matcher accepts a pattern and one or more timestamped observations, and determines whether the observations match the criteria specified by the pattern. The purpose of this tool is to evaluate examples and test cases which implement the patterning specification, as a form of executable documentation and to verify patterns express the desired criteria.



Install with pip:

$ pip install stix2-matcher


Installing the package creates a stix2-matcher script:

$ stix2-matcher -h
usage: stix2-matcher [-h] -p PATTERNS -f FILE [-e ENCODING] [-v] [-s STIX_VERSION]

Match STIX Patterns to STIX Observed Data

optional arguments:
  -h, --help            show this help message and exit
  -p PATTERNS, --patterns PATTERNS
                        Specify a file containing STIX Patterns,
                        one per line.
  -f FILE, --file FILE  A file containing JSON list of STIX
  observed-data SDOs
                        to match against.
  -e ENCODING, --encoding ENCODING
                        Set encoding used for reading observation
                        and pattern
                        files. Must be an encoding name Python
                        Default is utf8.
  -v, --verbose         Be verbose
  -s STIX_VERSION, --stix_version STIX_VERSION
                       Stix specification version. Default is 2.0


The STIX Pattern Matcher’s test suite can be run with pytest.

Updating the Grammar

The ANTLR pattern grammar is maintained in the stix2-json-schemas repository. If the grammar changes, the code in this repository should be updated to match. To do so, use the Java ANTLR package to generate new Python source files. (The .jar file is not needed for normal use of the validator).

  1. Download antlr-4.7-complete.jar from

  2. Clone the stix2-json-schemas repository or download the STIXPattern.g4 file.

  3. Change to the directory containing the STIXPattern.g4 file.

  4. Run the following command

    $ java -jar "/path/to/antlr-4.7-complete.jar" -Dlanguage=Python3 STIXPattern.g4 -o /path/to/cti-pattern-matcher/stix2matcher/grammars
  5. Commit the resulting files to git.


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