Agent with tesla 1

[tccontre]

Modified Detections to include Agent Tesla story line

• [x] detect_html_help_spawn_child_process.yml
• [x] excessive_usage_of_taskkill.yml
• [x] executables_or_script_creation_in_suspicious_path.yml
• [x] non_chrome_process_accessing_chrome_default_dir.yml
• [x] non_firefox_process_access_firefox_profile_dir.yml
• [x] office_application_drop_executable.yml
• [x] office_application_spawn_rundll32_process.yml
• [x] office_document_executing_macro_code.yml
• [x] powershell___connect_to_internet_with_hidden_window.yml
• [x] scheduled_task_deleted_or_created_via_cmd.yml
• [x] suspicious_process_file_path.yml
• [x] detect_html_help_spawn_child_process.yml

story

• [x] stories/agenttesla.yml

What does this PR have in it? Screenshots are worth 1000 words 😄

Checklist

• [ ] Validate name matches <platform>_<mitre att&ck technique>_<short description> nomenclature
• [ ] CI/CD jobs passed ✔️
• [ ] Validated SPL logic.
• [ ] Validated tags, description, and how to implement.
• [ ] Verified references match analytic.