[Virustotal] Error when enriching certain entities

[Lhorus6]

Description

On some entity, this error appears:

{ "timestamp": "2024-09-25T07:45:21.751840Z", "level": "ERROR", "name": "VirusTotal", "message": "Error in message processing, reporting error to API", "exc_info": "Traceback (most recent call last):\n File \"/usr/local/lib/python3.11/site-packages/pycti/connector/opencti_connector_helper.py\", line 352, in _data_handler\n message = self.callback(event_data)\n ^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/opencti-connector-virustotal/virustotal/virustotal.py\", line 425, in _process_message\n return self._process_file(stix_objects, stix_entity, opencti_entity)\n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\n File \"/opt/opencti-connector-virustotal/virustotal/virustotal.py\", line 269, in _process_file\n \"| \"\nTypeError: can only concatenate str (not \"NoneType\") to str" }

Environment

OCTI 6.2.18

Reproducible Steps

Steps to create the smallest reproducible scenario:

1. Enable the Virustotal enrichment connector
2. Try to enrich entities, hoping that an entity will raise this error

Additional information

Line 278 of the script we check that the variable is not None, otherwise we use the string "N/A".

However, for all the other previous ones (e.g. line 269) we don't do that and that seems to be the problem. Adding verification steps like in line 278 should fix the error.

[romain-filigran]

related to : #2671