Bad actors take advantage of the fact that most people aren't that tech savvy—hijacking accounts by using malware and phishing scams that trick users into sharing their passwords, or by using passwords obtained by hacking other websites. Most account hijackings are not very targeted; they are designed to steal identities, acquire financial data or send spam. But some attacks are targeted at specific individuals.
Through the strength of our cloud-based security and abuse detection systems*, we recently uncovered a campaign to collect user passwords, likely through phishing. This campaign, which appears to originate from Jinan, China, affected what seem to be the personal Gmail accounts of hundreds of users including, among others, senior U.S. government officials, Chinese political activists, officials in several Asian countries (predominantly South Korea), military personnel and journalists.
The goal of this effort seems to have been to monitor the contents of these users' emails, with the perpetrators apparently using stolen passwords to change peoples' forwarding and delegation settings. (Gmail enables you to forward your emails automatically, as well as grant others access to your account.)
Google detected and has disrupted this campaign to take users' passwords and monitor their emails. We have notified victims and secured their accounts. In addition, we have notified relevant government authorities.
It's important to stress that our internal systems have not been affected—these account hijackings were not the result of a security problem with Gmail itself. But we believe that being open about these security issues helps users better protect their information online.
Here are some ways to improve your security when using Google products:
Please spend ten minutes today taking steps to improve your online security so that you can experience all that the Internet offers—while also protecting your data.
*We also relied on user reports and this external report to uncover the campaign described.