[Question] Alter JSON output about evtx HOT 5 OPEN

I would probably use jq for this. https://stackoverflow.com/questions/49632521/how-to-add-a-field-to-a-json-object-with-the-jq-command.

It can also handle streams if that's an issue https://stackoverflow.com/questions/62825963/improving-performance-when-using-jq-to-process-large-files.

from evtx.

@OlafHaalstra , you will want to create a custom tool around the evtx library and do something like this:

    let mut evtx_parser = match EvtxParser::from_path(path) {
        Ok(p) => p.with_configuration(parser_settings),
        Err(e) => {
            eprintln!("Error handling {}; {}", path.display(), e);
            return;
        }
    };

    for result in evtx_parser.records_json_value() {
        let record = match result {
            Ok(r) => r,
            Err(e) => {
                eprintln!("Error serializing event record: {}", e);
                continue;
            }
        };

        let mut json_value = record.data;
        json_value["source_file"] = json!(path.to_string_lossy());

        println!("{}", json_value);
    }

I am actually planning to make a YouTube video this week that will showcase just this along with things like recursing and parsing files in parallel. Subscribe and hit the bell so it will alert you when this video comes out (https://www.youtube.com/channel/UCudIWnSPimNaqMyGoKbaneQ)

from evtx.

Preferably I want to have it baked into the code. Not sure where to start. Running into problems with option (2): apparently renaming fields is not trivial.

Replacing values is quite easy with: *v.get_mut("name").unwrap() = json!("Alice"); As well as adding something:

    let new_data = r#"{"name":"Alice"}"#;
    let new_value: JSONValue = serde_json::from_str(new_data)?;
    v["new"] = new_value;

Baking this into the library is not a good idea. Its better to augment data after you have parsed the raw data as this is personal preference on how you want to structure metadata around the parsed entry.

from evtx.

Preferably I want to have it baked into the code. Not sure where to start. Running into problems with option (2): apparently renaming fields is not trivial.

Replacing values is quite easy with: *v.get_mut("name").unwrap() = json!("Alice");
As well as adding something:

    let new_data = r#"{"name":"Alice"}"#;
    let new_value: JSONValue = serde_json::from_str(new_data)?;
    v["new"] = new_value;

from evtx.

@OlafHaalstra I made a video that I think will answer your question on how to do this and also give you an example of how to create a CLI around this library and tweak the json values. https://www.youtube.com/watch?v=yVeCAMQ5fZo

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