Editor's Note: The following report on U.S.-targeted Chinese cyber attacks, published in May 2008, broke new ground at the time and preceded, according to WikiLeaks information, a Chinese phishing attack that used a false National Journal address in an attempt to infect U.S. officials' computers with malware.
Computer hackers in China, including those working on behalf of the Chinese government and military, have penetrated deeply into the information systems of U.S. companies and government agencies, stolen proprietary information from American executives in advance of their business meetings in China, and, in a few cases, gained access to electric power plants in the United States, possibly triggering two recent and widespread blackouts in Florida and the Northeast, according to U.S. government officials and computer-security experts.
One prominent expert told National Journal he believes that China's People's Liberation Army played a role in the power outages. Tim Bennett, the former president of the Cyber Security Industry Alliance, a leading trade group, said that U.S. intelligence officials have told him that the PLA in 2003 gained access to a network that controlled electric power systems serving the northeastern United States. The intelligence officials said that forensic analysis had confirmed the source, Bennett said. "They said that, with confidence, it had been traced back to the PLA." These officials believe that the intrusion may have precipitated the largest blackout in North American history, which occurred in August of that year. A 9,300-square-mile area, touching Michigan, Ohio, New York, and parts of Canada, lost power; an estimated 50 million people were affected.
Officially, the blackout was attributed to a variety of factors, none of which involved foreign intervention. Investigators blamed "overgrown trees" that came into contact with strained high-voltage lines near facilities in Ohio owned by FirstEnergy Corp. More than 100 power plants were shut down during the cascading failure. A computer virus, then in wide circulation, disrupted the communications lines that utility companies use to manage the power grid, and this exacerbated the problem. The blackout prompted President Bush to address the nation the day it happened. Power was mostly restored within 24 hours.
There has never been an official U.S. government assertion of Chinese involvement in the outage, but intelligence and other government officials contacted for this story did not explicitly rule out a Chinese role. One security analyst in the private sector with close ties to the intelligence community said that some senior intelligence officials believe that China played a role in the 2003 blackout that is still not fully understood.
Bennett, whose former trade association includes some of the nation's largest computer-security companies and who has testified before Congress on the vulnerability of information networks, also said that a blackout in February, which affected 3 million customers in South Florida, was precipitated by a cyber-hacker. That outage cut off electricity along Florida's east coast, from Daytona Beach to Monroe County, and affected eight power-generating stations. Bennett said that the chief executive officer of a security firm that belonged to Bennett's trade group told him that federal officials had hired the CEO's company to investigate the blackout for evidence of a network intrusion, and to "reverse engineer" the incident to see if China had played a role.
Bennett, who now works as a private consultant, said he decided to speak publicly about these incidents to point out that security for the nation's critical electronic infrastructures remains intolerably weak and to emphasize that government and company officials haven't sufficiently acknowledged these vulnerabilities.
The Florida Blackout
A second information-security expert independently corroborated Bennett's account of the Florida blackout. According to this individual, who cited sources with direct knowledge of the investigation, a Chinese PLA hacker attempting to map Florida Power & Light's computer infrastructure apparently made a mistake. "The hacker was probably supposed to be mapping the system for his bosses and just got carried away and had a 'what happens if I pull on this' moment." The hacker triggered a cascade effect, shutting down large portions of the Florida power grid, the security expert said. "I suspect, as the system went down, the PLA hacker said something like, 'Oops, my bad,' in Chinese."
The power company has blamed "human error" for the incident, specifically an engineer who improperly disabled safety backups while working on a faulty switch. But federal officials are still investigating the matter and have not issued a final report, a spokeswoman for the Federal Energy Regulatory Commission said. The industry source, who conducts security research for government and corporate clients, said that hackers in China have devoted considerable time and resources to mapping the technology infrastructure of other U.S. companies. That assertion has been backed up by the current vice chairman of the Joint Chiefs of Staff, who said last year that Chinese sources are probing U.S. government and commercial networks.