Cyber attacks on government agencies are routine and the &quot;adversaries&quot; range from thrill-seeking hackers, through to criminals and foreign states.<p>But the ABC has been told this is a &quot;massive&quot; breach and one official said there was little doubt where it came from.<p>&quot;It&#x27;s China,&quot; he said.<p>The motivation for the attack on the bureau could be commercial, strategic or both.<p>The bureau is a critical national resource and another state would place a high value on its intellectual property and scientific research.