Internet security researchers said Thursday they may have been mistaken about claims that mobile devices powered by Google Inc.’s Android operating system were hacked and used to send spam emails.
The researchers from security company Sophos Ltd. and Google rival Microsoft Corp. each had written blog posts in recent days identifying what they said were incidents of Android devices being used to generate spam emails from Yahoo Mail’s app. A “spammer has control of a botnet that lives on Android devices,” Microsoft engineer Terry Zink wrote in a blog post Tuesday.