Late last week, organizations around the world, including in the U.S., Australia, and Canada, received emails claiming that an explosive device would detonate within their buildings unless a ransom in Bitcoin was paid. Samples of some of the emails show that the sender demanded $20,000 in payment, which was to be converted into Bitcoin and transferred to the sender’s Bitcoin wallet. The threats appear to have been a hoax – no detonations occurred and no devices were found. But the threats necessitated building evacuations and caused disruptions to organizations’ operations. If an organization receives a bomb threat via email, the NCCIC recommends the recipient not respond or try to contact the sender, not pay the ransom, and report the email to the FBI’s Internet Crime Complaint Center (IC3) or to their local FBI field office. NCCIC/US-CERT.