Highly recommend putting on a pair of disposable food prep gloves! Wash and remove the stems from all of the peppers. Give them a rough chop and add them to a small food processor. Blend them up for about 10-15 pulses.
Peel and rough chop the shallot and garlic and add these and garlic to the food processor. Blend until no large chunks are visible.
Add in the rice wine vinegar, sugar and salt and blend some more until the mixture is all in small pieces. Scrape the paste into a small saucepan and place over low/medium heat and simmer for 7-8 minutes, stirring frequently.
Remove from heat and allow to cool before transferring to a clean container for storage. Store in the refrigerator for up to 1 week.