'Google probing possible inside help on attack'

Google is investigating whether one or more employees may have helped facilitate a cyber-attack that the US search giant said it was a victim of in mid-December, two sources told Reuters on Monday.

Google is investigating whether one or more employees may have helped facilitate a cyber-attack that the US search giant said it was a victim of in mid-December, two sources told Reuters on Monday.

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Google, the world's most popular search engine, said last week it was thinking of pulling out of the world's biggest Internet market after reporting it had been hit by a "sophisticated" cyber-attack on its network that resulted in theft of its intellectual property.

The sources, who are familiar with the situation, said that the attack, which targeted people who have access to specific parts of Google networks, may have been facilitated by people working in Google China's office.

"We're not commenting on rumour and speculation. This is an ongoing investigation, and we simply cannot comment on the details," a Google spokeswoman said.

Security analysts said the malware used in the Google attack was a modification of a trojan called Hydraq. A trojan is malware that, once inside a computer, allows someone unauthorised access. The sophistication in the attack was in knowing whom to attack, not the malware itself, the analysts said.