That BGP hijack allowed the hacker to
redirect the miners' computers to a malicious server controlled by the
hijacker. From that server, the hacker sent the mining machines a
"reconnect" command that changed the mining computers' configuration to
contribute their processing power to a pool that stockpiled the bitcoins
they produced rather paying them out to the mining pool's participants.
"Some people are more attentive to their mining rigs than others," says
Joe Stewart, a Dell researcher whose own computers were caught up in
one victimized mining pool. "Many users didn't check their setups for
weeks, and they were doing all this work on behalf of the hijacker."
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