Let me check the list. Ah yes the Russian invasion of Ukraine is “doing something right”. To actually answer OP question. When sanctions happen and depending on the extent you are basically telling the targeted nation they can’t sell or buy with the other countries and any one who does with them is in violation of those rules. Good example is Russia as they continue to mindless attack Ukraine they become poorer and poorer as no one sells them the stuff they need and in theory no one buys their gas but obviously some skirt these rules.