Chinese software developers over the Green Dam Youth Escort monitoring program suffered several targeted attacks earlier this week, when documents containing malicious exploits were sent to attorneys, the firm stated late Wednesday.

On Monday evening, lawyers at the firm of Gipson Hoffman & Pancione received e-mails that appeared to have been sent by associates, the group said in its statement. The Trojan e-mail messages contained either links to Web sites or attachments and were specially constructed to retrieve data from the victim's computer or the company's server.

"The specific source of the attacks has not yet been determined, but it appears that they attacks were initiated within China," the firm said in its statement.