Match a line which NOT contains a certain sequence of characters AND contains a various sequence of characters

Question

To get only the lines which not contains ThisNot but contains ABCor abc I tried the regular expression and get no further here:

mm (abc|ABC)_^(?:(?!ThisNot).)+$\w* \[(\d|\d\d)]

Input can be:

 mm abc_ThisNot_576as [2]
 mm ABC_random_234 [34]
 mm abc_random_789 [5]
 mm abc_ThisNot2too_576as [2]

Result shall be:

 mm ABC_random_234 [34]
 mm abc_random_789 [5]