grep

CLI utility for searching text data sets for matching expressions.
You can use \| to separate "OR" strings
- For example, grep '445\|CLOSED\|ESTABLISHED'
Important options
- -i or --ignore-case
  - Search for string, regardless of case
  - Useful when adversaries use alternating caps to prevent search matches
- -v or --invert-match
  - Searches for any results that do NOT include the search term
- -n or --line-number
  - Get the line number with the output
Windows alternatives
- In PowerShell: Select-String
- In Windows command line (cmd.exe), findstr

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