Leantsiuk began her 2007 indoor season with an indoor best of in Brest. In good form, she won the Belarusian indoor title and represented her country at the 2007 European Athletics Indoor Championships, where she was fourth. A fourth-place finish at the 2007 European Cup Winter Throwing followed later that month. She threw the implement in Minsk that June and went on to claim silver medals at both the Summer Universiade and the Military World Games. At the start of 2008 she was fourth at the European Indoor Cup and fifth at the European Winter Throwing Cup. A significant personal best of came at the end of May but her performance at the 2008 European Cup was erased as she failed a doping test for excess testosterone and was banned from competition until July 2010.