"So far, [the perpetrators] appear to have just been looking around," said one person involved in the Nasdaq matter. Another person familiar with the case said the incidents were, for a computer network, the equivalent of someone sneaking into a house and walking around but—apparently, so far—not taking or tampering with anything.
Unsurprisingly, Nasdaq has not commented on the report. Investigators are worried that they still have not been able to figure out the hackers' motives nor are they confident that they've been able to plug all potential security holes. Furthermore, not only are the hackers identities still unknown, but officers still have not been able to figure out what country the hacks were initiated from. Some evidence points towards Russia, but the person or people responsible could be simply using computers in that country as a conduit.