“Volunteering during crisis - CTI League, a global threat intelligence experts community that neutralize cyber threats exploiting the current COVID-19 pandemic”. In the last months, a global army of 1800 cyber threat intelligence volunteers has been fighting threat actors looking to exploit the COVID-19 pandemic. The Cyber Threat Intelligence (CTI) League is the first community and global CERT in the world, established for helping the medical sector in its most sensitive time.