The White House has suffered a cyber attack from Chinese hackers attempting to infiltrate the Military Office’s (WHMO) computer system. The attempted breach — which was reported via The Washington Free Beacon this weekend and just confirmed by a White House official — was a “spear phishing” attack.

Spear phishing involves emailing a targeted address using phrases designed to coerce the recipient into clicking links or downloading attachments to distribute malware. In this case, the attack did wind up affecting an isolated, unclassified network, but there was no evidence that any sensitive data had been compromised, says the official.

The White House’s secured, classified system may not have been the target in this case, as it did remain fully intact. Good thing, too — the WHMO is responsible for the system used for nuclear commands.

[Via Politico]