On Saturday, Lockheed Martin released a statement confirming the attack, which it described as "significant and tenacious." But it said its information security team "detected the attack almost immediately and took aggressive actions to protect all systems and data."
As a result, the company said, "our systems remain secure; no customer, program, or employee personal data has been compromised."
Hackers reportedly exploited Lockheed's VPN access system, which allows employees to log in remotely by using their RSA SecurID hardware tokens. Attackers apparently possessed the seeds--factory-encoded random keys--used by at least some of Lockheed's SecurID hardware fobs, as well as serial numbers and the underlying algorithm used to secure the devices.
That suggests that whoever attacked Lockheed Martin may also have been behind the successful breach in March of EMC's RSA division, which manufactures SecurID. "Since then, there have been malware and phishing campaigns in the wild seeking specific data linking RSA tokens to the end user, leading us to believe that this attack was carried out by the original RSA attackers," Rick Moy, president and CEO of NSS Labs, said in a blog post.
According to security blogger Robert Cringely, aka Mark Stephens, who broke news of the attack against Lockheed Martin, "It seems likely that whoever hacked the RSA network got the algorithm for the current tokens and then managed to get a keylogger installed on one or more computers used to access the intranet" at Lockheed Martin. From there, attackers reportedly gained access to the company's internal network.
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