765 ILCS 721/10

If the landlord acts in violation of this Act, the tenant has a defense in any retaliatory action against the tenant, and a landlord shall be subject to a civil action for damages and other appropriate relief, including, but not limited to, the following remedies: (1) terminate the rental agreement and, if the rental agreement is terminated, the landlord shall return all security and interest recoverable under the Security Deposit Return Act and all prepaid rent; (2) recover possession of the premises if the landlord has dispossessed, threatened to dispossess, or is in the process of dispossessing; and (3) recovery of an amount equal to and not more than 2 months' rent or 2 times the damages sustained by the tenant, whichever is greater, and reasonable attorney's fees.