Don't get me wrong, this is a proxy war between NATO and Russia and both are to be condemned, as many communist parties recognised from the start: http://www.solidnet.org/article/Urgent-Joint-Statement-of-Communist-and-Workers-Parties-No-to-the-imperialist-war-in-Ukraine/

However, Russia is (was?) a minor imperialist in the economic sense. They export capital to România, Bulgaria, former USSR countries, etc. and extract super-profits. In terms of economic scale, the same kind of imperialism Italy or Hungary engage in. After the sanctions, perhaps less so.