Security-conscious travelers typically avoid public WiFi hotspots, instead using VPNs and other tools to make sure their data is safely encrypted as it transmits from computer to unsecured wireless router to the internet. According to networking security website, FireEye, that concern is justified. The security team discovered a malicious document in several emails sent to "multiple companies in the hospitality industry, including hotels in at least seven European countries and one Middle Eastern country in early July." The document contained a macro that installs GAMEFISH malware, which is associated with a politically-motivated Russian hacking group known as APT28 (or Fancy Bear). This is allegedly the same group that hacked the Democratic National Committee ahead of last year's US election. Even worse, the tool used after the initial malware installation, EternalBlue, reportedly leaked from the NSA itself.
According to FireEye, the EternalBlue exploit could let hackers access anyone's computer connected to the hotel WiFi and silently gather usernames and passwords without victims even having to type them in. "It's definitely a new technique" for this Russion hacker group, FireEye's Ben Read told Wired. "It's a much more passive way to collect on people. You can just sit there and intercept stuff from the WiFi traffic."
The security group warns travelers to be aware of the threat when visiting hotels in other countries (though unsecured WiFi isn't restricted to foreign hotels), and to take steps to secure their systems. "Publicly accessible WiFi networks present a significant threat and should be avoided whenever possible," wrote Ben Read and Lindsay Smith in a blog post.