The U.S. government has warned firms about a hacking campaign targeting the nuclear and energy sectors, the latest event to highlight the power industry's vulnerability to cyberattacks.
Since at least May, hackers used tainted phishing emails to "harvest credentials" so they could gain access to networks of their targets, according to a joint report from the U.S. Department of Homeland Security and Federal Bureau of Investigation.
The report provided to the industrial firms was reviewed by Reuters on Friday. While disclosing attacks and warning that in some cases hackers succeeded in compromising the networks of their targets, it did not identify any specific victims.