Facebook 'stalker' tool uses Graph Search for powerful data mining

When a high-profile public figure living in Hong Kong hired the security company Trustwave to test if its experts could get his passwords, they turned to Facebook.

While the dangers of sharing too much data on Facebook are well-known, it is surprising how little data can give hackers a foothold. The man gave Trustwave's team no-holds barred permission to try and snatch his data, a so-called "Red Team" test.

"We found out through Facebook who his wife was," said Jonathan Werrett, a managing consultant for Trustwave's SpiderLabs in Hong Kong. "We found out through her likes -- her public likes -- that she ran a pilates studio. We could then send a phishing email to her based around the fact that she ran a pilates studio that was hiring." The man's wife opened an email with a video demonstration of the bogus job candidate conducting a class. The malicious attachment infected her computer with malware, which gave Trustwave's analysts access, known as a spear-phishing attack.