BRENDAN MCARAVEY, Country Manager, Citrix South Africa, takes a look at what Cryptojacking jacking is, how it works and how it can be avoided.
Parasites in the digital world don’t kill, encrypt, or ransom the hosts as compared to the parasites in the real world. However, they do siphon off compute resources – preferably undetected. Compute resources are a valuable commodity in the world of crypto-mining. This stealthier malware phenomenon called ‘cryptojacking’ is becoming a popular payload since it’s an effective way to generate revenue with a lower chance of detection. The goal is to run undetected – stealing CPU cycles – essentially becoming a digital parasite.
Crafty adversaries driven by the opportunity of financial gain are weaponising crypto-mining to exploit the digital currency boom. Before we go any further, it is key to understand what ‘crypto-mining’ is? It is an intensive process – consistently running mathematical calculations that keep processors at 100% usage.
Professional miners make a large upfront investment in specialised hardware and infrastructure. Case in point, according to a South African gaming website, since the cryptocurrency boom, it has become extremely hard to get hands on graphics cards. They are mostly out of stock, with no guarantee on when they will be back in stock and sky-high prices are being asked for second-hand cards in local classifieds.
As more miners came online, the difficulty level adjusted so that running multiple graphics processing units (GPUs) became more effective at mining. Next came specialised chipsets or ASICs designed specifically for mining Bitcoin – these are getting smaller and more efficient. To increase the chances of pay-out, multiple miners join pools in which they are compensated based on their contribution of compute resources or hash power.
A tell-tale symptom of your CPU being used by miners is sluggishness, high CPU usage, and the whine of maxed-out RPM on the cooling fans. Cryptojacking is not just limited to laptops and PCs, mobile devices and gadgets are also susceptible, even more so since the mining scripts can run in the background or are more difficult to identify.
As with other attacks, server side cryptojacking can be more complex and more complicated once it spreads. If the attacker gets access to the infrastructure, he or she may provision additional servers – in cloud environments, expect to see new servers with high end specs and cost.
Locally we haven’t as yet witnessed cryptojacking attacks, however, globally an example is WannaMine, where the attackers use ‘live off the land’ technique such as Windows Management Instrumentation (WMI) permanent event subscriptions as a persistence mechanism. It also propagates via the EternalBlue exploit popularised by WannaCry.
It’s fileless nature and use of legitimate system software such as WMI and PowerShell make it difficult, if not impossible, for organisations to block it without some form of next-generation antivirus. Defending against cryptojacking requires a holistic approach and building a security architecture with a secure digital perimeter. The approach must focus on prevention as well as detection. Citrix has partnered with multiple security companies that enhance endpoint, network, server, and cloud protection.
For enterprises, delivering a locked down Secure Browser as a service can help reduce the attack surface by blocking the mining scripts as well as blocking the periodic call-backs to the mining pools – which are the command and control for crypto mining.
A critical component is early detection of CPU spikes above normal range – typically sustained. IT Operations should have defined CPU thresholds and analytics with alerts sent to admins when the CPU usage rises above the threshold. A couple of side notes here are that the alerts should disregard the process names – the digital parasite wants to remain undetected and can be disguised to be a system service or process.
Secondly, more devious adversaries will tune down the CPU leeching to not stand out as dramatically – effectively flying under the radar. Establishing a baseline and identifying aberrations quickly is the goal. Once detected, restoring the server to a golden image makes the process easier – local backdoor accounts, services, other changes can be undone.
Protecting against cryptojacking is very much the same as protecting against other malware – however, we are looking for different symptoms and long-term effects in hardware wear and tear, user performance degradation and loss of scalability. Higher costs in electricity or cloud usage are both more intermediate financial symptoms. Stay vigilant even if there are no demand notes or immediate indicators of compromise.
Now download a bank account
Absa has introduced an end-to-end account opening for new customers, through the Absa Banking App, which can be downloaded from the Android and Apple app stores. This follows the launch of the world first ChatBanking on WhatsApp service.
This “download your account” feature enables new customers to Absa, to open a Cheque account, order their card and start transacting on the Absa Banking App, all within minutes, from anywhere and at any time, by downloading it from the App stores.
“Overall, this new capability is not only expected to enhance the customer’s digital experience, but we expect to leverage this in our branches, bringing digital experiences to the branch environment and making it easier for our customers to join and bank with us regardless of where they may be,” says Aupa Monyatsi, Managing Executive for Virtual Channels at Absa Retail & Business Banking.
“With this innovation comes the need to ensure that the security of our customers is at the heart of our digital experience, this is why the digital onboarding experience for this feature includes a high-quality facial matching check with the Department of Home Affairs to verify the customer’s identity, ensuring that we have the most up to date information of our clients. Security is supremely important for us.”
The new version of the Absa Banking App is now available in the Apple and Android App stores, and anyone with a South African ID can become an Absa customer, by following these simple steps:
- Download the Absa App
- Choose the account you would like to open
- Tell us who you are
- To keep you safe, we will verify your cell phone number
- Take a selfie, and we will do facial matching with the Department of Home Affairs to confirm you are who you say you are
- Tell us where you live
- Let us know what you do for a living and your income
- Click Apply.
How we use phones to avoid human contact
A recent study by Kaspersky Lab has found that 75% of people pick up their connected device to avoid conversing with another human being.
Connected devices are becoming essential to keeping people in contact with each other, but for many they are also a much-needed comfort blanket in a variety of social situations when they do not want to interact with others. A recent survey from Kaspersky Lab has confirmed this trend in behaviour after three-quarters of people (75%) admitted they use a device to pretend to be busy when they don’t want to talk to someone else, showing the importance of keeping connected devices protected under all circumstances.
Imagine you’ve arrived at a bar and you’re waiting for your date. The bar is busy, and people are chatting all around you. What do you do now? Strike up a conversation with someone you don’t know? Grab your phone from your pocket or handbag until your date arrives to keep yourself busy? Why talk to humans or even make eye-contact with someone else when you can stare at your connected device instead?
The truth is, our use of devices is making it much easier to avoid small talk or even be polite to those around us, and new Kaspersky Lab research has found that 72% of people use one when they do not know what to do in a social situation. They are also the ‘go-to’ distraction for people even when they aren’t trying to look busy or avoid someone’s eye. 46% of people admit to using a device just to kill time every day and 44% use it as a daily distraction.
In addition to just being a distraction, devices are also a lifeline to those who would rather not talk directly to another person in day-to-day situations, to complete essential tasks. In fact, nearly a third (31%) of people would prefer to carry out tasks such as ordering a taxi or finding directions to where they need to go via a website and an app, because they find it an easier experience than speaking with another person.
Whether they are helping us avoid direct contact or filling a void in our daily lives, our constant reliance on devices has become a cause for panic when they become unusable. A third (34%) of people worry that they will not be able to entertain themselves if they cannot access a connected device. 12% are even concerned that they won’t be able to pretend to be busy if their device is out of action.
Dmitry Aleshin, VP for Product Marketing, Kaspersky Lab said, “The reliance on connected devices is impacting us in more ways than we could have ever expected. There is no doubt that being connected gives us the freedom to make modern life easier, but devices are also vital to help people get through different and difficult social situations. No matter what your ‘connection crutch’ is, it is essential to make sure your device is online and available when you need it most.”
To ensure your device lifeline is always there and in top health – no matter what the reason or situation – Kaspersky Security Cloud keeps your connection safe and secure:
· I want to use my device while waiting for a friend – is it secure to access the bar’s Wi-Fi?
With Kaspersky Security Cloud, devices are protected against network threats, even if the user needs to use insecure public Wi-Fi hotspots. This is done through transferring data via an encrypted channel to ensure personal data safety, so users’ devices are protected on any connection.
· Oh no! I’m bored but my phone’s battery is getting low – what am I going to do?
Users can track their battery level thanks to a countdown of how many minutes are left until their device shuts down in the Kaspersky Security Cloud interface. There is also a wide-range of portable power supplies available to keep device batteries charged while on-the-go.
· I’ve lost my phone! How will I keep myself entertained now?
Should the unthinkable happen and you lose or have your phone stolen, Kaspersky Security Cloud can track and protect your device from data breaches, for complete peace of mind. Remote lock and locate features ensure your device remains secure until you are reunited.