Michel Juneau-Katsuya, a security analyst and former CSIS intelligence officer, told CBC News on Thursday "all indications point at China" as the origin of the attempted cyber espionage.
He added that any such attack would have some connection to the government in China, which is also known for producing so-called "patriotic hackers" devoted to targeting institutions or governments perceived as threatening to the government at home.
Juneau-Katsuya said he believed Canada is seen by China as "a land of opportunity to get natural resources that they need so, so much."
At least two departments, Finance and Treasury Board, and the DND agency, had been compromised the same way the China-based hackers behind GhostNet had penetrated more than 100 other governments around the world.
CNet reports that China was traced as the source behind the cyberattacks launched against Google and other companies in 2009 as a way of targeting human rights activists. Specifically, the USCC found that a Chinese state-run telecommunications provider had redirected traffic for U.S. military and corporate data in April.