KrebsOnSecurity acquired a pleasant bump in site visitors this week because of tweets from the Federal Bureau of Investigation (FBI) and the Federal Communications Fee (FCC) about “juice jacking,” a time period first coined right here in 2011 to explain a possible menace of knowledge theft when one plugs their cellular system right into a public charging kiosk. It stays unclear what might have prompted the alerts, however the excellent news is that there are some pretty basic items you are able to do to keep away from having to fret about juice jacking.
On April 6, 2023, the FBI’s Denver workplace issued a warning about juice jacking in a tweet.
“Keep away from utilizing free charging stations in airports, motels or procuring facilities,” the FBI’s Denver workplace warned. “Unhealthy actors have discovered methods to make use of public USB ports to introduce malware and monitoring software program onto gadgets. Carry your personal charger and USB wire and use {an electrical} outlet as a substitute.”
5 days later, the Federal Communications Fee (FCC) issued the same warning. “Suppose twice earlier than utilizing public charging stations,” the FCC tweeted. “Hackers could possibly be ready to realize entry to your private data by putting in malware and monitoring software program to your gadgets. This rip-off is known as juice jacking.”
The FCC tweet additionally supplied a hyperlink to the company’s consciousness web page on juice jacking, which was initially revealed upfront of the Thanksgiving Vacation in 2019 however was up to date in 2021 after which once more shortly after the FBI’s tweet was picked up by the information media. The alerts have been so broadly and breathlessly lined within the press {that a} point out of juice jacking even made it into this week’s Late Late Present with James Corden.
The time period juice jacking crept into the collective paranoia of gadget geeks in the summertime of 2011, because of the headline for a narrative right here about researchers on the DEFCON hacker conference in Vegas who’d arrange a cellular charging station designed to teach the unwary to the truth that many cellular gadgets related to a pc would sync their knowledge by default.
Since then, Apple, Google and different cellular system makers have modified the way in which their {hardware} and software program works in order that their gadgets now not mechanically sync knowledge when one plugs them into a pc with a USB charging cable. As an alternative, customers are offered with a immediate asking in the event that they want to belief a related laptop earlier than any knowledge switch can happen.
Alternatively, the expertise wanted to conduct a sneaky juice jacking assault has turn out to be much more miniaturized, accessible and low-cost. And there at the moment are a number of merchandise anybody should buy which might be custom-built to allow juice jacking assaults.
Most likely one of the best identified instance is the OMG cable, a $180 hacking system made for skilled penetration testers that appears roughly like an Apple or generic USB charging cable. However contained in the OMG cable is a tiny reminiscence chip and a Wi-Fi transmitter that creates a Wi-Fi hotspot, to which the attacker can remotely join utilizing a smartphone app and run instructions on the system.
The $180 “OMG cable.” Picture: hak5.org.
Brian Markus is co-founder of Aries Safety, and one of many researchers who initially showcased the menace from juice jacking on the 2011 DEFCON. Markus stated he isn’t conscious of any public accounts of juice jacking kiosks being discovered within the wild, and stated he’s not sure what prompted the current FBI alert.
However Markus stated juice jacking remains to be a threat as a result of it’s far simpler and cheaper today for would-be attackers to supply and construct the mandatory gear.
“Since then, the expertise and parts have turn out to be a lot smaller and really simple to construct, which places this within the arms of much less refined menace actors,” Markus stated. “Additionally, now you can purchase all these things over-the-counter. I feel the chance is probably greater now than it was a decade in the past, as a result of a a lot bigger inhabitants of individuals can now pull this off simply.”
How critically ought to we take the current FBI warning? An investigation by the myth-busting website Snopes suggests the FBI tweet was only a public service announcement primarily based on a dated advisory. Snopes reached out to each the FBI and the FCC to request knowledge about how widespread the specter of juice jacking is in 2023.
“The FBI replied that its tweet was a ‘customary PSA-type submit’ that stemmed from the FCC warning,” Snopes reported. “An FCC spokesperson advised Snopes that the fee needed to make it possible for their advisory on “juice-jacking,” first issued in 2019 and later up to date in 2021, was up-to-date in order to make sure ‘the shoppers have essentially the most up-to-date data.’ The official, who requested anonymity, added that that they had not seen any rise in situations of client complaints about juice-jacking.”
What are you able to do to keep away from juice jacking? Convey your personal gear. A basic rule of thumb in safety is that if an adversary has bodily entry to your system, you may now not belief the safety or integrity of that system. This additionally goes for issues that plug into your gadgets.
Juice jacking isn’t attainable if a tool is charged by way of a trusted AC adapter, battery backup system, or by way of a USB cable with solely energy wires and no knowledge wires current. In case you lack this stuff in a bind and nonetheless want to make use of a public charging kiosk or random laptop, at the very least energy your system off earlier than plugging it in.
