[VulnCheck] Initial Implementation of VulnCheck Connector

[maddawik]

Proposed changes

This is the initial implementation of an external import connector for VulnCheck. It transforms several different data sources from our API, using our python-sdk, into STIX objects/relationships.

Some data sources ingest substantial volumes of data for parsing and generate a significant number of STIX objects and relationships as a result. These resource-intensive data sources have been highlighted in the documentation for user awareness.

Related issues

There are no related issues to link to this PR.

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality using different use cases
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality

Further comments

We've made our best effort to make design decisions that are in-line with OpenCTI's plugin architecture - that said, please let me know if there are improvements that can be made!

[maddawik]

I see that isort is failing in CI, however I'm unable to reproduce that locally with the same version of black and isort - please advise!

❯ poetry run black --version
black, 24.10.0 (compiled: yes)
Python (CPython) 3.12.8
❯ poetry run isort --profile black --check src/vclib/config_variables.py --verbose

                 _                 _
                (_) ___  ___  _ __| |_
                | |/ _/ / _ \/ '__  _/
                | |\__ \/\_\/| |  | |_
                |_|\___/\___/\_/   \_/

      isort your imports, so you don't have to.

                    VERSION 5.13.2

else-type place_module for os returned STDLIB
from-type place_module for pathlib returned STDLIB
else-type place_module for yaml returned THIRDPARTY
from-type place_module for pycti returned THIRDPARTY
from-type place_module for vclib.sources.data_source returned FIRSTPARTY
SUCCESS: /Users/user-name/vulncheck/opencti-connector/external-import/vulncheck/src/vclib/config_variables.py Everything Looks Good!
❯ poetry run isort --profile black --check src/vclib/connector_client.py --verbose

                 _                 _
                (_) ___  ___  _ __| |_
                | |/ _/ / _ \/ '__  _/
                | |\__ \/\_\/| |  | |_
                |_|\___/\___/\_/   \_/

      isort your imports, so you don't have to.

                    VERSION 5.13.2

else-type place_module for gzip returned STDLIB
else-type place_module for json returned STDLIB
else-type place_module for os returned STDLIB
else-type place_module for zipfile returned STDLIB
from-type place_module for datetime returned STDLIB
from-type place_module for typing returned STDLIB
else-type place_module for requests returned THIRDPARTY
else-type place_module for vulncheck_sdk returned THIRDPARTY
from-type place_module for pycti returned THIRDPARTY
from-type place_module for pydantic returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.advisory_botnet returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.advisory_ip_intel_record returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.advisory_ransomware_exploit returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.advisory_threat_actor_with_external_objects returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.advisory_vuln_check_kev returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.api_exploit_v3_result returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.api_initial_access returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.api_nvd20_cve returned THIRDPARTY
from-type place_module for vulncheck_sdk.models.api_nvd20_cve_extended returned THIRDPARTY
from-type place_module for vclib.config_variables returned FIRSTPARTY
from-type place_module for vclib.sources returned FIRSTPARTY
SUCCESS: /Users/user-name/vulncheck/opencti-connector/external-import/vulncheck/src/vclib/connector_client.py Everything Looks Good!