On 14 September 2016, the BBC interviewed Prof Bill Buchanan on a hack related to the therapeutic drug taking of US Athletes. The hack was published on the Fancy Bears web site, hosted by the Fancy Bears International Hack Team and whose aim is on "Fair Play and Clean Sport".
On 13 September 2016, the Fancy Bears website hosted information on the usage of certificates of approval for therapeutic use, and where the drug usage of US Athletes was outlined. This includes details on Simone Biles, Elena Delle Donne, and Serena and Venus Williams.
It is likely the hackers used a spear phishing attack to get access to ADAMS (Anti-Doping Administration and Management System). The likely mode is to send a user an email with a link, and for them to be tricked into entering their user name and password into a fake site.