What is the legal ruling regarding shares and profits deposited in the deceased's account, a portion of which was a gift to nephews, and are Libyan banks considered usurious?

The permissible capital is distributed among the heirs, and what the deceased gifted to his brother's children is given to them. If the profits from shares are lawful, they are distributed among the heirs, and what was designated for the brother's children is given to them. However, if the shares belong to usurious banks, their profits are unlawful and must be disposed of by giving them to the poor, the needy, and for the benefit of Muslims. Neither the heirs nor the brother's children are allowed to take from it unless they are poor and in need. Unlawful money does not become lawful through inheritance for the heirs. If lawful and unlawful money are mixed and the amount of each is unknown, it should be divided in half.