ALPHA FLIGHT (1983) #63

Technomancer is an American man who sends a computer virus to garner huge amounts of money. The virus is also sent to Canada, where it takes over the form of Box and Box rushes to America, attacking a military base. Madison Jeffries is able to finally phase out and construct another Box, destroying the virus-laden Box. Meanwhile, through a glitch of the virus, missiles are sent directly to the Technomancer, who is killed.