Yes. Allah ordered the punishment for theft in the Quran (5:38), which shows that it is a serious sin. Taking another person's property wrongfully in any way is forbidden.
Le voleur et la voleuse, à tous deux coupez la main, en punition de ce qu'ils se sont acquis, et comme châtiment de la part d'Allah. Allah est Puissant et Sage.
This is general information, not a fatwa. For your own situation, ask a qualified scholar.
Questions about halal and haram
Is stealing haram?
Yes. Allah ordered the punishment for theft in the Quran (5:38), which shows that it is a serious sin. Taking another person's property wrongfully in any way is forbidden.