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.
Kuma ɓarãwo da ɓarauniya sai ku yanke hannuwansu, bisa sakamako ga abin da suka tsirfanta, a kan azãba daga Allah. Kuma Allah Mabuwãyi ne, Mai hikima.
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.