TODAY

TODAY   |  February 20, 2013

Chinese government responsible for US cyber-attacks

According to a new report confirmed by United States intelligence, the source of a series of cyber-attacks against the U.S. has been traced to the Chinese government. NBC’s Andrea Mitchell reports.

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This content comes from Closed Captioning that was broadcast along with this program.

>> is announcing steps to counteract cyber attacks by the chinese government , who allegedly is trying to cause chaos here.

>> attorney general and others will be speaking out against the dangers of cyber attacks. major war against the cyber u.s. nonzript neighborhood and this 12-story building, the source of thousands of cyber attacks against 141 u.s. companies, spanning 20 industries. according to a new security report confirmed by u.s. intelligence , it is the headquarters of unit 61398, cyber warriors for china's people's liberty.

>> the chinese government sapgsing these attacks.

>> among the targets of the hackers, america's very infrastructure.

>> now our enemies are seeking the ability to sabotage our power grid , our financial institutions , our air traffic control systems.

>> reporter: other targets, the news media, including "the new york times," the washington post and wall street journal . and familiar brands like coca cola , facebook. ugly gorilla and dota, according to this instructional video from the computer security firm that did the study.

>> we see dota logging in.

>> reporter: attackers send deceptive e-mails, tricking users to clicking on a malicious link to a phony website so the hackers can steal confidential files, grabbing them back to shanghai.

>> when these companies are engaging in business in china, they are really going up against the full resources of the chinese government .

>> reporter: officials say they got nowhere. even this week, china's government again denied responsibility for the attacks. and computer experts say most companies are afraid if they complain about the hacking they'll then lose access to billions of dollars of business in china.