Following reports by Facebook and Apple that their computers had been hacked, Microsoft today said that it also “recently experienced a similar security intrusion.”
The attacks, Microsoft said, affected only a small number of its computers, “including some in our Mac business unit.” The techniques used by the attackers, Microsoft said, were similar to those reported by Facebook and Apple.
Microsoft said it had found no evidence of customer data being affected and that it continues its investigation.
Facebook had said that it discovered its systems had been attacked last month after some employees had visited a mobile developer website that was compromised. Facebook said in a posting last week:
The compromised website hosted an exploit which then allowed malware to be installed on these employee laptops. The laptops were fully-patched and running up-to-date anti-virus software. As soon as we discovered the presence of the malware, we remediated all infected machines, informed law enforcement, and began a significant investigation that continues to this day.
Apple said earlier this week that some of it employees’ computers had been hacked after its employees “visited a website for software dvelopers that had been infected with malicious software. The malware had been designed to attack Mac computers,” according to Reuters, which also reported:
The same software, which infected Macs by exploiting a flaw in a version of Oracle Corp’s Java software used as a plug-in on Web browsers, was used to launch attacks against Facebook. … Security firm F-Secure wrote that the attackers might have been trying to get access to the code for apps on smartphones, seeking a way to infect millions of end-users. It urged developers to check their source code for unintended changes.