Mix cream cheese, crab meat, green onions, garlic, soy sauce, fish sauce, Worcestershire sauce, salt, pepper, sesame oil, and cayenne pepper together with a fork until ingredients are blended thoroughly. Cover with plastic wrap and refrigerate until chilled, 1 or 2 hours.

Keep wonton wrappers moist by covering with a damp paper towel. Place a small bowl of water nearby on the work surface. With a wet fingertip, moisten surface of wonton. Place 1 1/2 teaspoons of crab filling in center of wonton. Fold 2 opposite corners toward each other over the filling but without touching tips together yet. Fold up the other 2 corners. Working gently from the bottom, squeeze out any air bubbles; pinch together the 4 seams from the bottom up to create a modified pyramid (or "warhead") shape. Place on a dry surface. Continue with remaining wontons.

Heat oil in deep fryer to 350 degrees F. Fry wontons in batches until golden brown and crispy, gently moving them around in the oil with a strainer to brown each surface, about 3 minutes. Let cool about a minute before eating. Serve with the dipping sauce.

Whisk ketchup, rice vinegar, brown sugar, and sriracha sauce together in a bowl for the dipping sauce.