In principle, a woman who is put in a situation where she is threatened with sexual abuse and rape should call for help and defend herself against the attacker. If the circumstances give her no other option, she may even kill the attacker.[1] The law courts of an Islāmic state will consider her claim and will not issue a verdict of qisās (retaliation) for murder if there is substantial circumstantial evidence in her favour.[2]

If a woman is sexually abused and the attacker is not apprehended, she may seek justice through the courts of an Islāmic state. Her lone testimony will not constitute sufficient evidence to make the hadd of stoning (for a married man) or 100 lashes (for an unmarried man) binding. Rather, the Qādī and law courts will assess all available circumstantial evidence, and  etc.[3]

And Allah Ta‘ālā Knows Bestif there is sufficient proof to convince them that sexual abuse took place, they may enforce some form of discretionary punishment on the attacker, like a long-term prison sentence
Source