Is money earned from marketing a product for someone who acquired it through illicit means considered lawful (halal) or unlawful (haram)? What is the ruling on profits resulting from this trade? And is the wage for managing this trade lawful (halal) or unlawful (haram)? How can one repent for such money?

If an item is received due to an accounting error, it is not permissible for the recipient [to keep], but rather it belongs to the company and must be returned. What is taken without right is considered usurped and must be returned. If the usurper trades with it and profits, the profit reverts to the owner of the item. The wages earned from operating a forbidden trade must be given away as charity.