Google CEO Sundar Pichai has become the latest tech executive to have a social media account hacked, and the group responsible says more targets will follow.On Sunday, a group of hackers calling themselves OurMine briefly took over Pichai\u2019s\u00a0 account on Quora, a question-and-answer site."We are just testing your security,\u201d the hackers wrote, with the same message auto-posted via Quora to Pichai\u2019s Twitter account. On Monday, the posts had been deleted.OurMine is the same group that hacked\u00a0the social media accounts of Facebook CEO Mark Zuckerberg earlier this month, and they've claimed other victims too, including the CEO of Spotify and a prominent Amazon executive.The hacks have been fairly innocuous so far, with no major repercussions or sensitive data stolen. But Silicon Valley types are likely wondering who'll be next.In Zuckerberg's case, the hackers claimed to have broken in by finding his password, \u201cdadada,\u201d which was exposed in a breach at LinkedIn.\u00a0In Pichai\u2019s case, OurMine only said that \u201chis security was really weak.\u201d The group posted information about the hack on its website.OurMine said via email that it would continue to hack the accounts of tech executives and celebrities.\u00a0Last week, the group claimed to have taken over the Twitter accounts of movie star Channing Tatum and of Daniel Ek, the CEO of Spotify, and posted screenshots.On Monday, the group hit the Twitter account of Amazon CTO Werner Vogels. In a tweet, Vogels said it was actually his Bitly account that had been compromised.So far, it seems the hacks are more of a publicity stunt. The group has tweeted that users can upgrade their security by purchasing OurMine\u2019s services.For $100, the group claims it can improve the security of social media accounts. For $1,000, it will scan a website for vulnerabilities."We are\u00a0just trying to tell everyone that nobody is safe!\u201d OurMine said via email. Some accounts were broken into because of weak passwords, others because of some "vulnerability," the group added, without specifying.\u00a0OurMine claimed to have made $18,400 so far selling its services.