An unidentified hacker tried to sell purported U.S. military documents containing information about combat drones last month, a cybersecurity research firm said, after they were allegedly stolen from an Air Force officerâs computer.
The hacker sought buyers for maintenance documents about the MQ-9 Reaper drone, a remotely controlled aerial vehicle used by the Pentagon and other parts of the government to conduct offensive strikes or reconnaissance and surveillance operations.
Discovery of the attempted sale of the stolen documents comes amid heightened concern about how U.S. military secrets may be insufficiently protected from hackers. Military officials said last month that the Defense Departmentâs inspector general was investigating a major security breach after Chinese hackers allegedly stole data pertaining to submarine warfare, including plans to build a supersonic antiship missile.
There was no evidence that the hacker who acquired the Reaper drone documents was affiliated with a foreign country, or that he was intentionally seeking to obtain military documents, said Andrei Barysevich, a senior threat researcher at Recorded Future, the U.S.-based cybersecurity firm that spotted the attempted sale. Instead, the hacker scanned large parts of the internet for misconfigured Netgear routers and exploited a two-year-old known vulnerability, involving default login credentials, to steal files from compromised machines.
Recorded Future said it has notified the Defense Security Service and the Department of Homeland Security about the hackerâs activities. A DHS spokesman said the agency was reviewing the information provided by Recorded Future but deferred further comment to the Air Force.
âWeâre aware of the reporting and there is an investigation into the incident,â said Erika Yepsen, an Air Force spokeswoman.
Posing as a potential buyer, researchers at the cyber firm contacted the seller, and during weeks of back-and-forth discussions were sent screenshots of the purportedly stolen documents. Those documents included the name of an Air Force captain stationed at the Creech Air Force Base in Nevada from whom the hacker is believed to have obtained the stolen drone files.
The hacker likely didnât know the value of the documents he had obtained because he was attempting to sell them for as little as $150, Barysevich said. He added that the hacker communicated in flawed English but would occasionally slip into Spanish, which along with other indicators led some of the researchers to think he may be based in South America.
Criminal hackers often attempt to anonymously purchase and sell stolen data on the dark web, but those transactions typically involve information that can be monetized in fraud schemes, such as passwords, usernames or financial records.Â But the sale of military documents on an open forum is incredibly rare, Barysevich said.
âIâve been personally researching dark web for 15 years, and I have never seen anything like this,â he said in an interview.
The documents shared by the hacker werenât marked as classified but could be used by an adversary to evaluate the capabilities and potential weaknesses of the Reaper drone, Recorded Future said. Some of the files included a warning that the material included technical data that was subject to export control.
Barysevich said the hackerâs methods werenât particularly sophisticated, and that his apparent success should raise concerns about what more advanced hacking groups may be stealing from the U.S. military.
The hacker also advertised the sale of another tranche of military documents that included a tank operation manual and training material on how to mitigate improvised explosive devices. It wasnât clear how the hacker obtained those documents, but they likely were taken from the Pentagon or a U.S. Army official, Recorded Future said.
Write to Dustin Volz at Dustin.Volz@wsj.com
Appeared in the July 12, 2018, print edition as ‘Hacker Allegedly Tried to Sell Drone Data.’