First Time Seen Command Line Argument

Description

This search looks for command-line arguments that use a /c parameter to execute a command that has not previously been seen.

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First Time Seen Command Line Argument Help

You must be ingesting data that records process activity from your hosts to populate the Endpoint data model in the Processes node. You must be ingesting logs with both the process name and command line from your endpoints. The complete process name with command-line arguments are mapped to the "process" field in the Endpoint data model. Please make sure you run the support search "Previously seen command line arguments,"—which creates a lookup file called previously_seen_cmd_line_arguments.csv—a historical baseline of all command-line arguments. You must also validate this list. For the search to do accurate calculation, ensure the search scheduling is the same value as the relative_time evaluation function.

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   Baseline Generation Searches

This detection relies on the following search to generate the baseline lookup.

  • Previously seen command line arguments