Taiwanese police handed out malware-infected USB thumb drives to the winners of a cyber-security quiz at a data security expo in December last year. The Criminal Investigation Bureau said 54 of the 250 8GB thumb drives it handed out contained malware. The sticks were handed out on December 11, but police stopped distributing them the next day after user complaints. The malware was a mundane and nondescript strain named XtbSeDuA.exe, which was tied to a cyber crime ring Europol shut down in 2015.
Source: https://www.bleepingcomputer.com/news/security/police-hand-out-malware-infected-usbs-as-prize-in-cyber-security-quiz/