panther-analysis-tool 0.45.0

Panther command line interface for writing, testing, and packaging policies/rules.

Panther Analysis Tool

Panther Analysis Tool is a Python application for testing, packaging, and deploying Panther Detections.

For further details, see Quick Start and Panther Documentation.

Installation

From PyPi

Use pip to install panther_analysis_tool package from PyPi:

pip3 install panther_analysis_tool

Or without a virtual environment:

make deps
pip3 install -e .

From source

make install
pipenv run -- pip3 install -e .

Usage

Help

Show available commands and their options:

$ panther_analysis_tool -h
usage: panther_analysis_tool [-h] [--version] [--debug] [--skip-version-check] {release,test,publish,upload,delete,update-custom-schemas,test-lookup-table,validate,zip,check-connection,benchmark,enrich-test-data} ...

Panther Analysis Tool: A command line tool for managing Panther policies and rules.

positional arguments:
  {release,test,publish,upload,delete,update-custom-schemas,test-lookup-table,validate,zip,check-connection,benchmark,enrich-test-data}
    release             Create release assets for repository containing panther detections. Generates a file called panther-analysis-all.zip and optionally generates panther-analysis-all.sig
    test                Validate analysis specifications and run policy and rule tests.
    publish             Publishes a new release, generates the release assets, and uploads them. Generates a file called panther-analysis-all.zip and optionally generates panther-analysis-all.sig
    upload              Upload specified policies and rules to a Panther deployment.
    delete              Delete policies, rules, or saved queries from a Panther deployment
    update-custom-schemas
                        Update or create custom schemas on a Panther deployment.
    test-lookup-table   Validate a Lookup Table spec file.
    validate            Validate your bulk uploads against your panther instance
    zip                 Create an archive of local policies and rules for uploading to Panther.
    check-connection    Check your Panther API connection
    benchmark           Performance test one rule against one of its log types. The rule must be the only item in the working directory or specified by --path, --ignore-files, and --filter. This feature is an extension
                        of Data Replay and is subject to the same limitations.
    enrich-test-data    Enrich test data with additional enrichments from the Panther API.

optional arguments:
  -h, --help            show this help message and exit
  --version             show program's version number and exit
  --debug
  --skip-version-check

Test

Run tests for a given path:

$ panther_analysis_tool test --path tests/fixtures/valid_policies/
[INFO]: Testing analysis packs in tests/fixtures/valid_policies/

AWS.IAM.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

Upload

Create packages to upload through the Panther UI:

$ panther_analysis_tool zip --path tests/fixtures/valid_policies/ --out tmp
[INFO]: Testing analysis packs in tests/fixtures/valid_policies/

AWS.IAM.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

[INFO]: Zipping analysis packs in tests/fixtures/valid_policies/ to tmp
[INFO]: <current working directory>/tmp/panther-analysis-2020-03-23T12-48-18.zip

Or upload packages directly into Panther:

$ panther_analysis_tool upload --path tests/fixtures/valid_policies/ --out tmp
[INFO]: Testing analysis packs in tests/fixtures/valid_policies/

AWS.IAM.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

AWS.IAM.BetaTest
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

AWS.CloudTrail.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

[INFO]: Zipping analysis packs in tests/fixtures/valid_policies/ to tmp
[INFO]: Found credentials in environment variables.
[INFO]: Uploading pack to Panther
[INFO]: Upload success.
[INFO]: API Response:
{
  "modifiedPolicies": 0,
  "modifiedRules": 0,
  "newPolicies": 2,
  "newRules": 1,
  "totalPolicies": 2,
  "totalRules": 1
}

Filtering

The test, zip, and upload commands all support filtering. Filtering works by passing the --filter argument with a list of filters specified in the format KEY=VALUE1,VALUE2. The keys can be any valid field in a policy or rule. When using a filter, only anaylsis that matches each filter specified will be considered. For example, the following command will test only items with the AnalysisType as policy AND severity as High:

$ panther_analysis_tool test --path tests/fixtures/valid_policies --filter AnalysisType=policy Severity=High
[INFO]: Testing analysis packs in tests/fixtures/valid_policies

AWS.IAM.BetaTest
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

Alternately, the following command will test items with the AnalysisType policy OR rule, AND the severity High:

$ panther_analysis_tool test --path tests/fixtures/valid_policies --filter AnalysisType=policy,rule Severity=High
[INFO]: Testing analysis packs in tests/fixtures/valid_policies

AWS.IAM.BetaTest
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

AWS.CloudTrail.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

When writing policies or rules that refer to the global analysis types, include them in the filter. An empty string as a filter value means the filter applies only if the field exists. The following command returns an error: the policy imports a global, but the global lacks a severity and thus is excluded by the filter.

$ panther_analysis_tool test --path tests/fixtures/valid_policies --filter AnalysisType=policy,global Severity=Critical
[INFO]: Testing analysis packs in tests/fixtures/valid_policies

AWS.IAM.MFAEnabled
    [ERROR] Error loading module, skipping

Invalid: tests/fixtures/valid_policies/example_policy.yml
    No module named 'panther'

[ERROR]: [('tests/fixtures/valid_policies/example_policy.yml', ModuleNotFoundError("No module named 'panther'"))]

For this query to work, allow for the abscence of the severity field:

$ panther_analysis_tool test --path tests/fixtures/valid_policies --filter AnalysisType=policy,global Severity=Critical,""
[INFO]: Testing analysis packs in tests/fixtures/valid_policies

AWS.IAM.MFAEnabled
    [PASS] Root MFA not enabled fails compliance
    [PASS] User MFA not enabled fails compliance

Filters work for the zip and upload commands in the exact same way they work for the test command.

In addition to filtering, setting a minimum number of unit tests is possible with the --minimum-tests flag. Detections lacking the minimum number of tests are considered failing. If --minimum-tests is set to 2 or greater, the requirement becomes that at least one test must return True and another must return False.

$ panther_analysis_tool test --path tests/fixtures/valid_policies --minimum-tests 2
% panther_analysis_tool test --path okta_rules --minimum-tests 2
[INFO]: Testing analysis packs in okta_rules

Okta.AdminRoleAssigned
    [PASS] Admin Access Assigned

Okta.BruteForceLogins
    [PASS] Failed login

Okta.GeographicallyImprobableAccess
    [PASS] Non Login
    [PASS] Failed Login

--------------------------
Panther CLI Test Summary
    Path: okta_rules
    Passed: 0
    Failed: 3
    Invalid: 0

--------------------------
Failed Tests Summary
    Okta.AdminRoleAssigned
         ['Insufficient test coverage, 2 tests required but only 1 found.', 'Insufficient test coverage: expected at least one passing and one failing test.']

    Okta.BruteForceLogins
        ['Insufficient test coverage, 2 tests required but only 1 found.', 'Insufficient test coverage: expected at least one passing and one failing test]

    Okta.GeographicallyImprobableAccess
        ['Insufficient test coverage: expected at least one passing and one failing test.']

In this case, even though the rules passed all their tests, they are still considered failing because they do not have the correct test coverage.

Delete Rules, Policies, or Saved Queries

$ panther_analysis_tool delete

usage: panther_analysis_tool delete [-h] [--no-confirm] [--athena-datalake] [--api-token API_TOKEN] [--api-host API_HOST] [--aws-profile AWS_PROFILE] [--analysis-id ANALYSIS_ID [ANALYSIS_ID ...]]
                                    [--query-id QUERY_ID [QUERY_ID ...]]

Delete policies, rules, or saved queries from a Panther deployment

optional arguments:
  -h, --help            show this help message and exit
  --no-confirm          Skip manual confirmation of deletion (default: False)
  --athena-datalake     Instance DataLake is backed by Athena (default: False)
  --api-token API_TOKEN
                        The Panther API token to use. See: https://docs.panther.com/api-beta (default: None)
  --api-host API_HOST   The Panther API host to use. See: https://docs.panther.com/api-beta (default: None)
  --aws-profile AWS_PROFILE
                        The AWS profile to use when updating the AWS Panther deployment. (default: None)
  --analysis-id ANALYSIS_ID [ANALYSIS_ID ...]
                        Space separated list of Detection IDs (default: [])
  --query-id QUERY_ID [QUERY_ID ...]
                        Space separated list of Saved Queries (default: [])

Pass a space-separated list of Analysis IDs (RuleID or PolicyID) or QueryIDs. Use the --no-confirm flag to bypass confirmation prompts. Rules and their associated saved queries will be matched and deleted. The default configuration targets a Snowflake datalake; for an Athena datalake, use the --athena-datalake flag.

Configuration File

Panther Analysis Tool will also read options from a configuration file .panther_settings.yml in the current working directory. An example configuration file is included in this repo, example_panther_config.yml, that contains example syntax for supported options.

Options in the configuration file take precedence over command-line options. For instance, if minimum_tests: 2 is set in the configuration file and --minimum-tests 1 is specified on the command line, the minimum number of tests will be 2.

Contributing

All contributions are welcome. Prior to submitting pull requests, consult the contributing guidelines. For steps to open a pull request from a fork, refer to GitHub's guide.

Local Development

To develop with the panther_analysis_tool locally, prepare two repositories: this one and another containing the panther analysis content for PAT testing.

From your panther_analysis content repository, install as editable (and test, for example):

pipenv install --editable ../relative/path/to/panther_analysis_tool
pipenv run panther_analysis_tool test

License

This repository is licensed under the AGPL-3.0 license.