6 mobile security threats you should take seriously in 2019

Mobile malware? Some mobile security threats are more pressing. Every enterprise should have its eye on these issues in the coming year.

Mobile security
IDGNS

Mobile security is at the top of every company's worry list these days — and for good reason: Nearly all workers now routinely access corporate data from smartphones, and that means keeping sensitive info out of the wrong hands is an increasingly intricate puzzle. The stakes, suffice it to say, are higher than ever: The average cost of a corporate data breach is a whopping $3.86 million, according to a 2018 report by the Ponemon Institute. That's 6.4 percent more than the estimated cost just one year earlier. 

While it's easy to focus on the sensational subject of malware, the truth is that mobile malware infections are incredibly uncommon in the real world — with your odds of being infected significantly less than your odds of being struck by lightning, according to one estimate. That's thanks to both the nature of mobile malware and the inherent protections built into modern mobile operating systems.

The more realistic mobile security hazards lie in some easily overlooked areas, all of which are only expected to become more pressing in the coming year:

1. Data leakage

It may sound like a diagnosis from the robot urologist, but data leakage is widely seen as being one of the most worrisome threats to enterprise security as we head into 2019. Remember those almost nonexistent odds of being infected with malware? Well, when it comes to a data breach, companies have a nearly 28 percent chance of experiencing at least one incident in the next two years, based on Ponemon's latest research — odds of more than one in four, in other words.

What makes the issue especially vexing is that it often isn't nefarious by nature; rather, it's a matter of users inadvertently making ill-advised decisions about which apps are able to see and transfer their information.

"The main challenge is how to implement an app vetting process that does not overwhelm the administrator and does not frustrate the users," says Dionisio Zumerle, research director for mobile security at Gartner. He suggests turning to mobile threat defense (MTD) solutions — products like Symantec's Endpoint Protection Mobile, CheckPoint's SandBlast Mobile, and Zimperium's zIPS Protection. Such utilities scan apps for "leaky behavior," Zumerle says, and can automate the blocking of problematic processes.

Of course, even that won't always cover leakage that happens as a result of overt user error — something as simple as transferring company files onto a public cloud storage service, pasting confidential info in the wrong place, or forwarding an email to an unintended recipient. That's a challenge the healthcare industry is currently struggling to overcome: According to specialist insurance provider Beazley, "accidental disclosure" was the top cause of data breaches reported by healthcare organizations in the third quarter of 2018. That category combined with insider leaks accounted for nearly half of all reported breaches during that time span.

For that type of leakage, data loss prevention (DLP) tools may be the most effective form of protection. Such software is designed explicitly to prevent the exposure of sensitive information, including in accidental scenarios.

2. Social engineering

The tried-and-true tactic of trickery is just as troubling on the mobile front as it is on desktops. Despite the ease with which one would think social engineering cons could be avoided, they remain astonishingly effective.

A staggering 91 percent of cyber crime starts with email, according to a 2018 report by security firm FireEye. The firm refers to such incidents as "malware-less attacks," since they rely on tactics like impersonation to trick people into clicking dangerous links or providing sensitive info. Phishing, specifically, grew by 65 percent over the course of 2017, the company says, and mobile users are at the greatest risk of falling for it because of the way many mobile email clients display only a sender's name — making it especially easy to spoof messages and trick a person into thinking an email is from someone they know or trust.

In fact, users are three times more likely to respond to a phishing attack on a mobile device than a desktop, according to an IBM study — in part simply because a phone is where people are most likely to first see a message. While only 4 percent of users actually click on phishing-related links, according to Verizon's 2018 Data Breach Investigations Report, those gullible guys and gals tend to be repeat offenders: The company notes that the more times someone has clicked on a phishing campaign link, the more likely they are to do it again in the future. Verizon has previously reported that 15 percent of users who are successfully phished will be phished at least one more time within the same year.

"We do see a general rise in mobile susceptibility driven by increases in mobile computing overall [and] the continued growth of BYOD work environments," says John "Lex" Robinson, information security and anti-phishing strategist at PhishMe — a firm that uses real-world simulations to train workers on recognizing and responding to phishing attempts.

Robinson notes that the line between work and personal computing is also continuing to blur. More and more workers are viewing multiple inboxes — connected to a combination of work and personal accounts — together on a smartphone, he notes, and almost everyone conducts some sort of personal business online during the workday. Consequently, the notion of receiving what appears to be a personal email alongside work-related messages doesn't seem at all unusual on the surface, even if it may in fact be a ruse.

3. Wi-Fi interference

A mobile device is only as secure as the network through which it transmits data. In an era where we're all constantly connecting to public Wi-Fi networks, that means our info often isn't as secure as we might assume.

Just how significant of a concern is this? According to research by enterprise security firm Wandera, corporate mobile devices use Wi-Fi almost three times as much as they use cellular data. Nearly a quarter of devices have connected to open and potentially insecure Wi-Fi networks, and 4 percent of devices have encountered a man-in-the-middle attack — in which someone maliciously intercepts communication between two parties — within the most recent month. McAfee, meanwhile, says network spoofing has increased "dramatically" as of late, and yet less than half of people bother to secure their connection while traveling and relying on public networks.

"These days, it's not difficult to encrypt traffic," says Kevin Du, a computer science professor at Syracuse University who specializes in smartphone security. "If you don't have a VPN, you're leaving a lot of doors on your perimeters open."

Selecting the right enterprise-class VPN, however, isn't so easy. As with most security-related considerations, a tradeoff is almost always required. "The delivery of VPNs needs to be smarter with mobile devices, as minimizing the consumption of resources — mainly battery —  is paramount," Gartner's Zumerle points out. An effective VPN should know to activate only when absolutely necessary, he says, and not when a user is accessing something like a news site or working within an app that's known to be secure.

4. Out-of-date devices

Smartphones, tablets and smaller connected devices — commonly known as the Internet of Things (IoT) — pose a new risk to enterprise security in that unlike traditional work devices, they generally don't come with guarantees of timely and ongoing software updates. This is true particularly on the Android front, where the vast majority of manufacturers are embarrassingly ineffective at keeping their products up to date — both with operating system (OS) updates and with the smaller monthly security patches between them — as well as with IoT devices, many of which aren't even designed to get updates in the first place.

"Many of them don't even have a patching mechanism built in, and that's becoming more and more of a threat these days," Du says.

Increased likelihood of attack aside, an extensive use of mobile platforms elevates the overall cost of a data breach, according to Ponemon, and an abundance of work-connected IoT products only causes that figure to climb further. The Internet of Things is "an open door," according to cybersecurity firm Raytheon, which sponsored research showing that 82 percent of IT professionals predicted that unsecured IoT devices would cause a data breach — likely "catastrophic" — within their organization.

Again, a strong policy goes a long way. There are Android devices that do receive timely and reliable ongoing updates. Until the IoT landscape becomes less of a wild west, it falls upon a company to create its own security net around them.

5. Cryptojacking attacks

A relatively new addition to the list of relevant mobile threats, cryptojacking is a type of attack where someone uses a device to mine for cryptocurrency without the owner's knowledge. If all that sounds like a lot of technical mumbo-jumbo, just know this: The cryptomining process uses your company's devices for someone else's gain. It leans heavily on your technology to do it — which means affected phones will probably experience poor battery life and could even suffer from damage due to overheating components.

While cryptojacking originated on the desktop, it saw a surge on mobile from late 2017 through the early part of 2018. Unwanted cryptocurrency mining made up a third of all attacks in the first half of 2018, according to a Skybox Security analysis, with a 70 percent increase in prominence during that time compared to the previous half-year period. And mobile-specific cryptojacking attacks absolutely exploded between October and November of 2017, when the number of mobile devices affected saw a 287 percent surge, according to a Wandera report.

Since then, things have cooled off somewhat, especially in the mobile domain — a move aided largely by the banning of cryptocurrency mining apps from both Apple's iOS App Store and the Android-associated Google Play Store in June and July, respectively. Still, security firms note that attacks continue to see some level of success via mobile websites (or even just rogue ads on mobile websites) and through apps downloaded from unofficial third-party markets.

Analysts have also noted the possibility of cryptojacking via internet-connected set-top boxes, which some businesses may use for streaming and video casting. According to security firm Rapid7, hackers have found a way to take advantage of an apparent loophole that makes the Android Debug Bridge — a command-line tool intended only for developer use — accessible and ripe for abuse on such products.

For now, there's no great answer — aside from selecting devices carefully and sticking with a policy that requires users to download apps only from a platform's official storefront, where the potential for cryptojacking code is markedly reduced — and realistically, there's no indication that most companies are under any significant or immediate threat, particularly given the preventative measures being taken across the industry. Still, given the fluctuating activity and rising interest in this area over the past months, it's something well worth being aware of and keeping an eye on in the coming year.

6. Physical device breaches

Last but not least is something that seems silly but remains a disturbingly realistic threat: A lost or unattended device can be a major security risk, especially if it doesn't have a strong PIN or password and full data encryption.

Consider the following: In a 2016 Ponemon study, 35 percent of professionals indicated their work devices had no mandated measures in place to secure accessible corporate data. Worse yet, nearly half of those surveyed said they had no password, PIN, or biometric security guarding their devices — and about two-thirds said they didn't use encryption. Sixty-eight percent of respondents indicated they sometimes shared passwords across personal and work accounts accessed via their mobile devices.

The take-home message is simple: Leaving the responsibility in users' hands isn't enough. Don't make assumptions; make policies. You'll thank yourself later.

SUBSCRIBE! Get the best of CSO delivered to your email inbox.