By Jim Finkle BOSTON (Reuters) – French aerospace engine maker Snecma, a unit of Safran, was attacked by hackers who exploited a vulnerability in Microsoft Corps Internet Explorer, according to a computer security researcher. It was not clear how successful the hackers had been in their efforts to breach Snecmas network, according to the researcher, who has studied malicious software and infrastructure used by the hackers. A spokeswoman for Snecmas parent, Safran, said she had no immediate comment. The researcher said the malicious software used by the hackers contained code that identified Internet domain names belonging to Snecma.