Las Vegas Sands Corp. brought its worldwide websites back online on Monday after a hacking attack forced the company to shut its home pages and other online operations last week, a spokesman said. The sites were “not the identical versions” of what they were before the company was hacked, spokesman Ron Reese said. Las Vegas Sands, which owns the Venetian on the Vegas Strip as well as casinos in China and Singapore, is working with investigators to identify who defaced its web pages and also exposed sensitive employee information, including Social Security numbers, Reese said. Instead of the normal display, the hacked website showed a map of the United States with images of flames marking Las Vegas Sands casino locations along with a photo of Sands Chairman Sheldon Adelson and Israeli Prime Minister Benjamin Netanyahu, according to screen shots of the website, published in the Las Vegas Review-Journal.