Researchers have discovered a second instance of suspected Russian hackers repurposing iOS exploits believed to originally be made on behalf of the U.S. government, pointing to what they say are several foreboding trends. iVerify , Lookout and Google collaborated on the research published Wednesday, a follow-up to earlier revelations about a similar exploit kit , Coruna. While the second kit — dubbed DarkSword — also targeted users in Ukraine, the scale is significant: iVerify estimated up to