fixed investigations

[carellamartina]

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Description

Please include a summary of the change and link to the related issue.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue).
• New feature (non-breaking change which adds functionality).
• Breaking change (fix or feature that would cause existing functionality to not work as expected).

Checklist

• I have read and understood the rules about how to Contribute to this project
• The pull request is for the branch develop
• A new plugin (analyzer, connector, visualizer, playbook, pivot or ingestor) was added or changed, in which case:
  • I strictly followed the documentation "How to create a Plugin"
  • Usage file was updated.
  • Advanced-Usage was updated (in case the plugin provides additional optional configuration).
  • If the plugin requires mocked testing, _monkeypatch() was used in its class to apply the necessary decorators.
  • I have dumped the configuration from Django Admin using the dumpplugin command and added it in the project as a data migration. ("How to share a plugin with the community")
  • If a File analyzer was added and it supports a mimetype which is not already supported, you added a sample of that type inside the archive test_files.zip and you added the default tests for that mimetype in test_classes.py.
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  • Check if it could make sense to add that analyzer/connector to other freely available playbooks.
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• If external libraries/packages with restrictive licenses were used, they were added in the Legal Notice section.
• Linters (Black, Flake, Isort) gave 0 errors. If you have correctly installed pre-commit, it does these checks and adjustments on your behalf.
• I have added tests for the feature/bug I solved (see tests folder). All the tests (new and old ones) gave 0 errors.
• If changes were made to an existing model/serializer/view, the docs were updated and regenerated (check CONTRIBUTE.md).
• If the GUI has been modified:
  • I have a provided a screenshot of the result in the PR.
  • I have created new frontend tests for the new component or updated existing ones.

Important Rules

• If you miss to compile the Checklist properly, your PR won't be reviewed by the maintainers.
• If your changes decrease the overall tests coverage (you will know after the Codecov CI job is done), you should add the required tests to fix the problem
• Everytime you make changes to the PR and you think the work is done, you should explicitly ask for a review. After being reviewed and received a "change request", you should explicitly ask for a review again once you have made the requested changes.