Hackers mislead certain employees to gain access to internal tools to take over high-profile accounts and push out a Bitcoin scam. Twitter acknowledged Thursday that there has been concern following this incident around our tools and levels of employee access, and said that it s taking steps and updating its account tools to make them more sophisticated The company continues to investigate the attack and work with authorities to identify and those responsible.
Source: https://threatpost.com/twitter-hack-mobile-spearphishing-scam/157896/