Added option to export as JSON file, split method to parse evtx lines

[okynos]

Hello!,

I have added to evtxtoelk.py script the option to write the output to a .json file, this allows to ingest such events by any logcollector software that supports JSON, e.g. Wazuh.

I have tested all included or modified methods with ELK 7.9.1 (All seems to work as expected).
Some examples:
Event from security event channel in JSON format (from output file)

{"Event": {"@xmlns": "http://schemas.microsoft.com/win/2004/08/events/event", "System": {"Provider": {"@Name": "Microsoft-Windows-Security-Auditing", "@Guid": "{54849625-5478-4994-a5ba-3e3b0328c30d}"}, "EventID": {"@Qualifiers": "", "#text": "4798"}, "Version": "0", "Level": "0", "Task": "13824", "Opcode": "0", "Keywords": "0x8020000000000000", "TimeCreated": {"@SystemTime": "2020-11-06T11:30:22.746094"}, "EventRecordID": "6184", "Correlation": {"@ActivityID": "{6dcbcce3-b2a9-0000-2ece-cb6da9b2d601}", "@RelatedActivityID": ""}, "Execution": {"@ProcessID": "604", "@ThreadID": "5308"}, "Channel": "Security", "Computer": "DESKTOP-XXXXXXX", "Security": {"@UserID": ""}}, "EventData": {"Data": {"TargetUserName": "test", "TargetDomainName": "DESKTOP-XXXXXXX", "TargetSid": "S-1-5-21-390896367-1170454209-2448961607-1001", "SubjectUserSid": "S-1-5-21-390896367-1170454209-2448961607-1001", "SubjectUserName": "test", "SubjectDomainName": "DESKTOP-XXXXXXX", "SubjectLogonId": "0x000000000008a1e5", "CallerProcessId": "0x0000000000000f60", "CallerProcessName": "C:\\Windows\\explorer.exe"}}}, "@timestamp": "2020-11-06T11:30:22.746094"}

I tried to modify the options less than possible so I changed ELK IP parameter to output that let the user introduce the combination of IP:PORT option or JSON filename (finished in .json) to select output method.
Execution example:
To JSON file:

python .\evtxtoelk.py .\security.evtx security.json
6184 events exported to security.json

To ELK:

python .\evtxtoelk.py .\security.evtx 192.168.2.10
Bulking final set of records to ES: 1
.
.
.

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I have also added a debug option to see the processed events in the JSON output.
I hope it will help to solve some data ingestion related issues.

Regards!.

[sonarcloud]

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