Krivoshapka, who was part of the silver medal-winning women's relay team, was disqualified after a positive test for the anabolic steroid turinabol, the IOC said. Her relay teammates will also be stripped of their medals.
The IOC is re-testing hundreds of samples from the London and Beijing Olympics in an effort to detect any cheats using newer methods or looking for drugs that were at the time undetectable.
More than 100 athletes have so far tested positive in these re-tests, with Russia having the most cases per nation.
