KrebsOnSecurity received a nice bump in traffic this week thanks to tweets from the Federal Bureau of Investigation (FBI) and the Federal Communications Commission (FCC) about “juice jacking,” a term first coined here in 2011 to describe a potential threat of data theft when one plugs their mobile device into a public charging kiosk. It remains unclear what may have prompted the alerts, but the good news is that there are some fairly basic things you can do to avoid having to worry about juice jacking.
On April 6, 2023, the FBI’s Denver office issued a warning about juice jacking in a tweet.
“Avoid using free charging stations in airports, hotels or shopping centers,” the FBI’s Denver office warned. “Bad actors have figured out ways to use public USB ports to introduce malware and monitoring software onto devices. Carry your own charger and USB cord and use an electrical outlet instead.”
Five days later, the Federal Communications Commission (FCC) issued a similar warning. “Think twice before using public charging stations,” the FCC tweeted. “Hackers could be waiting to gain access to your personal information by installing malware and monitoring software to your devices. This scam is referred to as juice jacking.”
The FCC tweet also provided a link to the agency’s awareness page on juice jacking, which was originally published in advance of the Thanksgiving Holiday in 2019 but was updated in 2021 and then again shortly after the FBI’s tweet was picked up by the news media. The alerts were so broadly and breathlessly covered in the press that a mention of juice jacking even made it into this week’s Late Late Show with James Corden.
The term juice jacking crept into the collective paranoia of gadget geeks in the summer of 2011, thanks to the headline for a story here about researchers at the DEFCON hacker convention in Vegas who’d set up a mobile charging station designed to educate the unwary to the reality that many mobile devices connected to a computer would sync their data by default.
Since then, Apple, Google and other mobile device makers have changed the way their hardware and software works so that their devices no longer automatically sync data when one plugs them into a computer with a USB charging cable. Instead, users are presented with a prompt asking if they wish to trust a connected computer before any data transfer can take place.
On the other hand, the technology needed to conduct a sneaky juice jacking attack has become far more miniaturized, accessible and cheap. And there are now several products anyone can buy that are custom-built to enable juice jacking attacks.
Probably the best known example is the OMG cable, a $180 hacking device made for professional penetration testers that looks more or less like an Apple or generic USB charging cable. But inside the OMG cable is a tiny memory chip and a Wi-Fi transmitter that creates a Wi-Fi hotspot, to which the attacker can remotely connect using a smartphone app and run commands on the device.
The $180 “OMG cable.” Image: hak5.org.
Brian Markus is co-founder of Aries Security, and one of the researchers who originally showcased the threat from juice jacking at the 2011 DEFCON. Markus said he isn’t aware of any public accounts of juice jacking kiosks being found in the wild, and said he’s unsure what prompted the recent FBI alert.
But Markus said juice jacking is still a risk because it is far easier and cheaper these days for would-be attackers to source and build the necessary equipment.
“Since then, the technology and components have become much smaller and very easy to build, which puts this in the hands of less sophisticated threat actors,” Markus said. “Also, you can now buy all this stuff over the counter. I think the risk is possibly higher now than it was a decade ago, because a much larger population of people can now pull this off easily.”
How seriously should we take the recent FBI warning? An investigation by the myth-busting site Snopes suggests the FBI tweet was just a public service announcement based on a dated advisory. Snopes reached out to both the FBI and the FCC to request data about how widespread the threat of juice jacking is in 2023.
“The FBI replied that its tweet was a ‘standard PSA-type post’ that stemmed from the FCC warning,” Snopes reported. “An FCC spokesperson told Snopes that the commission wanted to make sure that their advisory on “juice-jacking,” first issued in 2019 and later updated in 2021, was up-to-date so as to ensure ‘the consumers have the most up-to-date information.’ The official, who requested anonymity, added that they had not seen any rise in instances of consumer complaints about juice-jacking.”
What can you do to avoid juice jacking? Bring your own gear. A general rule of thumb in security is that if an adversary has physical access to your device, you can no longer trust the security or integrity of that device. This also goes for things that plug into your devices.
Juice jacking isn’t possible if a device is charged via a trusted AC adapter, battery backup device, or through a USB cable with only power wires and no data wires present. If you lack these things in a bind and still need to use a public charging kiosk or random computer, at least power your device off before plugging it in.
As an avid internet surfer, you’ve most likely heard of cookies. No, we’re not talking about the ones filled with chocolate chips. We’re talking about the ones that allow you to log in to your favorite websites. Cookies may impact your online security, so check out these tips to manage them and keep your online accounts safe.
Ever wonder how a website saves the items you placed in your shopping cart last week, even though you closed the tab before making the purchase? This is made possible by cookies. According to the Federal Trade Commission, a cookie is information saved by your web browser. When you visit a website, the site may place a cookie on your web browser so it can recognize your device in the future. If you return to that site later, it can read that cookie to remember you from your last visit, keeping track of your activities over time.1
Cookies come in either the first-party or third-party variety. There’s no difference between the two in how they function, but rather in where and how you encountered them. First-party cookies belong to sites you visited first-hand in your browser. Third-party cookies, or “tracking cookies,” generally come from third-party advertising websites.
Although cookies generally function the same, there are technically two different types of cookies. Magic cookies refer to packets of information that are sent and received without changes. Historically, this would be used to log in to a computer database system, such as an internal business network. This concept predates the modern cookie we use today.
HTTP cookies are a repurposed version of the magic cookie built for internet browsing and managing online experiences. HTTP cookies help web developers give you more personalized, convenient website experiences. They allow sites to remember you, your website logins, and shopping carts so you can pick back up where you left off from your last visit. However, cybercriminals can manipulate HTTP cookies to spy on your online activity and steal your personal information.
Cookie hijacking (also known as session hijacking) is typically initiated when a cybercriminal sends you a fake login page. If you click the fake link, the thief can steal the cookie and capture anything you type while on the fraudulent website. Like a phishing attack, cookie hijacking allows a cybercriminal to steal personal information like usernames, passwords, and other important data held within the cookie. If you enter your information while on the fake website, the criminal can then put that cookie in their browser and impersonate you online. They may even change your credentials, locking you out of your account.
Sometimes, criminals initiate cookie hijacking attacks without a fake link. If you’re browsing on an unsecured, public Wi-Fi connection, hackers can easily steal your data that’s traveling through the connection. This can happen even if the site is secure and your username and password are encrypted.
Because the data in cookies doesn’t change, cookies themselves aren’t harmful. They can’t infect computers with viruses or malware. But if your cookies are hijacked as part of a cyberattack, a criminal could gain access to your browsing history and use cookies as the key to enter your locked accounts. For example, a hacker may steal your identity or confidential company information, purchase items in your online shopping carts, or loot your bank account.
Preventing cookie hijacking attacks can allow you to browse the internet with greater peace of mind. Follow these tips to not only safeguard your personal information but to also enhance your browsing experience:
Make it a habit to clear your cookie cache regularly to prevent cookie overload, which could slow your search speeds. Also, almost every browser has the option to enable/disable cookies on your computer. So if you don’t want them at all, your browser’s support section can walk you through how to disable them.
Although it’s convenient to not have to re-type your credentials into a website you frequently visit, autofill features could make it easier for a criminal to extract your data with cookie hijacking. Plus, autofill is risky if your physical device falls into the wrong hands. To browse more securely without having to constantly reenter your passwords, use a password manager like McAfee True Key. True Key makes it so you only have to remember one master password, and it encrypts the rest in a vault protected by one of the most secure encryption algorithms available.
Strong, unique passwords for each of your accounts, updated regularly, offer ample protection against hackers. Multi-factor authentication (MFA) adds yet another layer of security by double-checking your identity beyond your username and password, usually with a texted or emailed code. When your accounts offer MFA, always opt in.
Criminals can hijack your cookies if you’re browsing on an unsecured, public Wi-Fi connection. To prevent a criminal from swiping your data, use a virtual private network (VPN), a service that protects your data and privacy online. A VPN creates an encrypted tunnel that makes you anonymous by masking your IP address while connecting to public Wi-Fi hotspots. This is a great way to shield your information from online spies while you’re banking, shopping, or handling any kind of sensitive information online.
McAfee LiveSafe is an antivirus solution that protects your computer and mobile devices from suspicious web cookies by:
The post What Are Browser Cookies and How Do I Manage Them? appeared first on McAfee Blog.
It’s fun to jump on our favorite social media sites such as Facebook, Instagram, or LinkedIn and know we can quickly check in with friends and family, discover interesting content, and instantly connect with colleagues worldwide. The last thing on most of our minds when tapping our way into these familiar online communities is being the target of cybercrime.
But it’s happening more and more.
Last month, The Federal Trade Commission (FTC) described popular social media sites as “goldmines” for malicious attacks. The FTC revealed that more than one in four people who reported losing money to fraud in 2021 said it started on social media with an ad, a post, or a message. More than 95,000 people reported about $770 million in losses to fraud initiated on social media platforms in 2021. According to the FTC, those losses account for about 25 percent of all reported losses to fraud in 2021 and represent a stunning eighteenfold increase over 2017 reported losses.
The social environment is a magnet for bad actors because people of every age and country flock there each day. The constant flow of conversation and content—and more importantly, the climate of trust—makes social networks juicy targets for cybercrime.
The biggest motivation? The emerging digital security threat of cryptojacking (aka illegal cryptomining). Cryptojacking is illegally accessing another person’s computer power to mine cryptocurrency. Cybercriminals do this by getting a victim to click on a malicious link delivered via direct message, a news story, or an ad. Once clicked, that link loads crypto mining code on the victim’s computer or leads them to an infected website or online ad with JavaScript code that auto-executes once it’s loaded in the victim’s browser. Often the malware goes undetected, and the only way a victim might know their system has been compromised is that it may start performing more slowly.
While bad actors use social media platforms to distribute cryptomining malware, they also spread other malware types such as advertisements, faulty plug-ins, and apps that draw users in by offering “too good to be true” deals. Once clicked on, the malware allows cybercriminals to access data, create keyloggers, release ransomware, and monitor social media accounts for future scamming opportunities.
Be sure your kids understand the risks and responsibilities associated with device ownership. Consider putting time aside each week to discuss crucial digital literacy topics and ongoing threats such as cryptomining malware. Consider a “device check-in” that requires each person in your family to “check off” the following security guidelines.
To help protect your family devices from viruses, malware, spyware, and other digital threats entering social media sites, consider adding extra security to your family devices with McAfee Total Protection.
Avoid posting home addresses, full birth dates, employer information, school information, as well as exact location details of where you are.
Install software updates so that attackers cannot take advantage of the latest security loopholes.
Select passwords that will be difficult for bad actors to guess and use different passwords for different programs and devices.
For a virus to solve cryptographic calculations required to mine cryptocurrency requires an enormous amount of computer processing power (CPUs). Cryptojacking secretly consumes a victim’s processing power, battery life, and computer or device memory. Look out for a decline in device processing speed.
Be careful when accepting friend requests, direct messages, or clicking on links sent by someone you don’t know personally. This is one of the most popular ways cybercriminals gain access.
Be discerning even when a known friend sends you a second friend request claiming they’ve been hacked. Search known names on the platform for multiple accounts. Cybercriminals have been known to gather personal details of individuals, pose as that person, then connect with friend lists using familiar information to build trust with more potential victims.
Be sure to report any fraudulent activity you encounter on social platforms to help stop the threat from spreading to other accounts, including friends and family who may be connected back to you.
New scams and more sophisticated ways to steal data—and computer processing power for illegal cryptomining—surface daily. Staying in front of those threats and folding them into your family dynamic is one of the most powerful ways to give your kids the skills and security habits they will need to thrive in today’s digital world.
The post Social Media: How to Steer Your Family Clear of Cryptomining Malware appeared first on McAfee Blog.
Cryptocurrency enthusiasts are flocking to the Wild West of Bitcoin and Monero to cash in on the recent gold rush. Bitcoin’s meteoric rise in value is making coin mining an appealing hobby or even a whole new career. Coin mining software is the main tool in a prospector’s belt.
Some coin miners, also known as cryptocurrency miners, are tempted by the dark side of the industry and resort to nefarious means to harness the immense computing power needed for cryptocurrency profits. Greedy cryptocurrency criminals employ a practice called cryptojacking, stealing the computer power of unsuspecting devices to help them mine faster. Your device could be at risk at being recruited to their efforts.
Let’s dig into how coin mining programs work, why they turn malicious, and how you can stay safe from cryptojackers.
Mining cryptocurrency takes a lot of time and computer processing power. A coin mining home setup requires a graphics processing unit (GPU) or an application-specific integrated circuit (ASIC). Coin mining software then runs off the GPU or ASIC. Each central processing unit (CPU), or the brain of the computer, plus the GPU or ASIC is referred to as a mining rig.
Once the software is installed, the rig is ready to mine, running mathematical calculations to verify and collect new cryptocurrency transactions. Each calculation is known as a hash, and hash rates are the number of calculations that can be run per second.
From there, casual miners may choose to join a mining pool, which is a club of miners who agree to consolidate their computing power and split the profits based on how much work each miner contributed to the output.
Bitcoin rewards miners every 10 minutes for their efforts. Each time miners solve a string of mathematical puzzles, they validate a chain of transactions, thus helping make the entire Bitcoin system more secure. Miners are paid in bitcoin and they also receive a transactional fee.
While coin mining typically starts off as a casual hobby, coin mining programs can turn malicious when cryptocurrency miners want to earn more without investing in boosting their own computing power. Instead, they reroute their targets’ computing power without asking. This is called cryptojacking.
Mining requires incredible amounts of electricity and the more rigs involved; the more cryptocurrency can be mined. Usually, the utility bills and the cost of running coin mining software negates any profit. For example, a casual miner may have one rig devoted to mining. An average rig processes approximately 500 hashes per second on the Monero network (a type of cryptocurrency). However, 500 hashes per second translates to less than a dollar per week in traditional, or fiat, currency.
Greedy cryptocurrency criminals recruit CPU soldiers to their mining army to improve their hash rate. To do so, criminals download coin mining software to a device and then program it to report back to their server. The device’s thinking power is diverted from the owner and funneled straight to the criminal’s server that now controls it. Compromised devices run considerably slower and can overheat, and the strain on the device can eventually destroy it.
Cryptojackers are not your everyday thieves. Their target is your CPU power, and they employ devious methods to funnel it for their own use. Luckily, there are a few easy ways to thwart their efforts:
Personal devices are often infected through phishing within emails and texts. There are many tell-tale signs of a phishing message. For example, they are often poorly written and use language that indicates that the sender wants a hasty response. Also, phishing attempts often charade as official organizations, like banks and credit card companies. If you are ever suspicious of an email or text, do not open any of the links and do not reply. Instead, contact the organization’s customer support to verify the legitimacy of the message.
Another way miners gain access to personal devices is by camouflaging malicious code in pop-up ads. An easy way to avoid being cryptojacked is to simply never click on these ads. Or even better, install an ad blocker to help eliminate the risk.
Public wi-fi and poorly protected networks present a vulnerable entry point for cybercriminals to hack into your devices. Cybercriminals often attempt to download software remotely to your laptop, desktop, or mobile device to reroute its computing power for their own selfish gains. Always connect to a VPN like McAfee Safe Connect VPN to safely surf unsecure networks.
Cryptojacking code is inconspicuous and generally hidden in legitimate code. Antivirus software, such as McAfee Total Protection, is a recommended way to proactively scan for malware and even identify fraudulent websites. McAfee WebAdvisor has a Chrome extension that specifically blocks cryptojackers.
Be aware of the signs your devices have been cryptojacked. For example, monitor any changes in the speed of your devices and check out your utility bills for dramatic spikes. By remaining vigilant with these tips, you will keep your devices safe from cryptocurrency miners gone rogue.
To stay updated on all things McAfee and on top of the latest consumer and mobile security threats, follow @McAfee_Home on Twitter, subscribe to our email, listen to our podcast Hackable?, and ‘Like’ us on Facebook.
The post Why Coin Miners Go Bad & How to Protect Your Tech When They Do appeared first on McAfee Blogs.
Cybercriminals are often seen as having the upper hand over the “white hat” community. After all, they’re anonymous, can launch attacks from virtually anywhere in the world, and usually have the element of surprise. But there’s one secret weapon the good guys have: Collaboration. That’s why Trend Micro has always prioritized its partnerships with law enforcement, academia, governments and other cybersecurity businesses.
We’re proud to have contributed to yet another successful collaborative operation with INTERPOL Global Complex for Innovation (IGCI) in Singapore that’s helped to reduce the number of users infected by cryptomining malware by 78%.
Cryptomining On The Rise
Also known as cryptojacking, these attacks have become an increasingly popular way for cybercriminals to make money.
Why?
Because victims don’t know they’ve been infected. The malware sits on their machine in the background mining for digital currency 24/7/365. Increasingly, hackers have taken to launching sophisticated attacks against enterprise IT systems and cloud servers to increase their mining and earning potential. But many still target home computer systems like routers, as these are often left relatively unprotected. Stitch enough of these devices together in a botnet and they have a ready-made cash cow.
That’s why cryptojacking remained the most detected threat in the first half of 2019 in terms of file-based threat components, according to our data.
Unlike serious data breaches, phishing attacks, ransomware and banking Trojans, cryptojacking doesn’t have major impact on the victim. They don’t lose sensitive personal data, there’s no risk of follow-on identity fraud and they’re not extorted for funds by being locked out of their PC.
However, it’s not without consequences: Cryptomining malware can slow your home network to a crawl while running up serious energy bills. It may even bring your home computers to a premature end. Also, there’s always the risk with any kind of malware infection that hackers may switch tactics and use their footprint on your home machines to launch other attacks in the future.
Enter Operation Goldfish Alpha
That’s why we were keen to offer our assistance to INTERPOL during this year’s Operation Goldfish Alpha. Thanks to our broad global visibility into attack trends and infection rates, we were able to articulate the scale of the cryptojacking threat and key mitigation steps, at a pre-operation meeting with ASEAN law enforcement officers in June.
A few months later, we developed and disseminated a key Cryptojacking Mitigation and Prevention guidance document. It details how a vulnerability in MikroTik routers had exposed countless users in the region to the risk of compromise by cryptomining malware. The document explains how to scan for this flaw using Trend Micro HouseCall for Home Networks, and how HouseCall can be used to detect and delete the Coinhive JavaScript that hackers were using to mine for digital currency on infected PCs.
Spectacular Success
Over the five months of Operation Goldfish Alpha, experts from national Computer Emergency Response Teams (CERTs) and police across 10 countries in the region worked to locate the infected routers, notify the victims and use our guidance document to patch the bugs and kick out the hackers.
Having helped to identify over 20,000 routers in the region that were hacked in this way, we’re delighted to say that by November, the number had reduced by at least 78%.
That’s the value of partnerships between law enforcement and private cybersecurity companies: They combine the power of investigative policing with the detailed subject matter expertise, visibility and resources of industry experts like us. We’ll continue to lend a hand wherever we can to make our connected, digital world a safer place.
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