Month: March 2020
IT departments have been forced to address cybersecurity risks with remote workers in a hurry due to the 2019 Novel Coronavirus pandemic that has seen large sections of the workforce forced into working from home.
The International Workplace Group conducted a study in 2019 and found that 50% of employees spend at least half of the week working remotely, and 70% of workers spend at least one day each week working from home. The 2019 Novel Coronavirus pandemic has increased that percentage considerably. Many companies have all but closed down their offices and have told their employees they must work from home.
While this is an important strategy for ensuring the safety of the workforce, there are many cybersecurity risks with remote workers and IT departments will find it much harder to secure their systems, protect confidential data, and quickly respond to security incidents.
One of the biggest problems for IT departments is the speed at which changes had to be made to accommodate a massive increase in remote workers. There has been little time to prepare properly, provide training, and ensure the cybersecurity risks with remote workers are all addressed.
Cybercriminals are Targeting Remote Workers
The massive increase in remote workers due to the 2019 Novel Coronavirus pandemic has given cybercriminals easy targets to attack, and unsurprisingly remote workers are being targeted. Remote workers are seen as low hanging fruit and attacks are far easier than when workers are in the office.
Several phishing campaigns have been detected targeting home workers that attempt to obtain email and VPN credentials. These phishing attacks are likely to increase considerably over the coming weeks and months. Attacks on VPNs have also increased, with cybercriminals exploiting unpatched vulnerabilities to steal credentials and gain access to corporate networks.
Campaigns have been detected spoofing Zoom and other videoconferencing platforms. According to Check Point, there have been 1,700 new Zoom domains registered in 2020 and 25% of those have been registered in the past two weeks. Other videoconferencing and communication platforms are also being targeted.
Addressing Cybersecurity Risks with Remote Workers
The massive increase in the number of employees working from home has increased the attack surface dramatically. Laptops, smartphones, and tablets are remotely connecting to the network, often for the very first time. It is essential that al of those devices are secured and data is appropriately protected.
Any device allowed to connect to the network remotely must have the best security software installed to protect against malware. Devices must be running the latest versions of operating systems and patches need to be applied promptly. Some studies suggest that it takes companies around 3 months on average to patch vulnerabilities. For remote workers, patching needs to be accelerated considerably and, ideally, software and operating systems should be configured to update automatically. Computers used by remote workers must also have firewalls enabled.
Ensure Home Routers are Secured
With many countries in lockdown and people being told not to leave the house, one of the biggest problem areas with remote working has been solved. The use of unsecured pubic Wi-Fi networks. When remote workers connect to unsecured public Wi-Wi networks, it is easy for cybercriminals to intercept sensitive corporate data, steal login credentials, and install malware. The Novel Coronavirus pandemic has seen remote workers abandon coffee shops and public Wi-Fi access points and stay at home; however, home Wi-Fi networks may be just as vulnerable.
Home workers will connect to the internet through consumer-grade routers, which will be far less secure than the office. Home Wi-Fi is often poorly secured and many devices that connect to Wi-Fi will have scant security controls in place. Remote workers must ensure that their home Wi-Fi network is protected with a strong password and that routers have WPA2 enabled.
Ensure Remote Workers Use a VPN and Establish a Secure Connection
It is essential for remote workers to establish a secure connection when accessing work resources and the easiest way to do this is with a virtual private network (VPN). A VPN client should be installed on all devices that you allow to remotely connect to the network.
Several vulnerabilities have been found in VPNs over the past year, and even months after patches have been released by VPN solution providers that patches have yet to be applied. Patching VPNs can be difficult when they are in use 24/7, but prompt patching is essential. There has been an increase in cyberattacks exploiting vulnerabilities in VPNs in recent weeks. In addition to ensuring the latest version of VPN clients are used and VPN solutions are patched quickly, training must be provided to remote workers to ensure they know how to use VPNs.
Ensure Multifactor Authentication Is Enabled
Strong passwords must be set to prevent brute force password guessing attempts from succeeding, but passwords alone do not provide sufficient protection for remote workers. You must ensure that multifactor authentication is enabled for all cloud services and for email accounts. If credentials are compromised in a phishing attack, it will not be possible for the credentials to be used to access accounts and sensitive data without another factor also being provided, such as a one-time code sent to an employee’s cellphone.
Security Awareness Training for Remote Workers
IT staff will be well aware that even the best security defenses can be breached as a result of the actions of employees. Employees are the weakest link in the security chain, but through security awareness training risk can be significantly reduced. Most companies will provide security awareness training to staff as part of the onboarding process, and often refresher training sessions will be provided on an annual basis. Consider increasing training for remote workers and conducting training sessions far more frequently.
The purpose of cybersecurity awareness training is to teach employees the skills they will need to recognize and avoid threats and to change the mindset of workers and create a culture of cybersecurity. Best practices for cybersecurity must be taught to prevent employees from falling prey to cyberattacks when working remotely. Employees need to be made aware of the cybersecurity risks with remote workers, which may not have been covered in training sessions when employees were only working in the office. Training remote staff should now be a priority. It is important to step up training to help remote workers identify phishing emails, spoofing, impersonation attacks, and also to teach remote workers about good IT hygiene.
Protect Against Web-Based Attacks
The dangers that come from the internet should be covered in security awareness training, but not all web-based threats are easy for remote workers to identify. Malicious adverts can be found on all manner of websites that direct users to phishing sites and websites where drive by malware downloads occur. To address cybersecurity risks for remote workers when accessing the internet, a web filtering solution should be deployed.
Cloud-based web filters are the most practical choice as they are easy to deploy, require no software downloads, and do not need to be patched or updated as that is handled by the solution provider. DNS-based filters are the best choice as they will involve no latency, which can be a major issue when bandwidth will be limited in workers’ homes.
WebTitan prevents remote workers from visiting or being redirected to known malicious websites and allows IT teams to control the types of websites that can be accessed on work devices to further reduce risk. Since WebTitan integrates with Active Directory and LDAP, IT teams can monitor the internet activity of all employees and can configure the solution to block malicious file downloads and the downloading unauthorized programs onto work devices.
It is fair to say that more people are now working from home than ever before and the number is growing rapidly due to the coronavirus pandemic. Here we explore some of the key cybersecurity challenges for remote working and suggest ways that CIOs and IT managers can reduce risk, keep their networks secure, and protect their workers.
COVID-19 and Remote Working
Even in the absence of a pandemic, an increasing number of people are working from home for at least part of the week. One study conducted by the International Workplace Group in 2018 suggests 50% of employees spend at least two and a half days a week working from home and 70% spend at least one day a week working from home.
The coronavirus pandemic is rapidly changing that. Governments around the world are recommending people work from home if they possibly can and many want to do so to reduce the risk of contracting COVID-19. With the 2019 Novel Coronavirus pandemic likely to last for several months at the very least, that is unlikely to change any time soon. Businesses will come under increasing pressure to get their employees set up for working at home.
Cybersecurity Challenges for Remote Working
For many businesses, having to set up large number of employees to work from home in such a short space of time will have come as a major shock. Rather than being able to transition gradually, the quarantine measures and social distances demanded in response to the coronavirus pandemic has given businesses and their CIOs and IT teams little time to prepare and address the cybersecurity challenges for remote working.
Some employees will already be working from home some of the time, so they will be familiar with the steps they need to take to access work networks and applications securely from home, but for a great deal of workers this will be their first time. Those workers therefore need to be trained and made aware of the additional risks, they must learn how to access work systems remotely, and the steps they need to take to do so securely.
Measures need to be considered to reduce the harm that can be caused should devices be lost or stolen, as the risk of device theft increases considerably when IT equipment is taken out of the office. Even if workers are not venturing out of the house to coffee shops, home environments may not be as safe and secure as the office.
Cyberslacking is likely to increase considerably when workers are not being directly supervised due to working at home, so loss of productivity is a real issue. Productivity losses due to people working from home is a key business concern that should be addressed. Cyber risks also increase from internet access at home.
The risk of insider threats also increases with more remote workers. Steps should be taken to reduce the potential for fraud and data theft.
It is relatively easy for organizations to effectively manage risk when users are connected to internal networks when working in the office. Doing the same when most of the workforce is working remotely is a different matter entirely. As the attack surface increases, mitigating risks and protecting against cyberthreats becomes a major challenge.
There are also issues with authentication. A known individual may be attempting to connect to the network, but it becomes harder to determine is that person is who they claim to be. Authentication measures need to be stepped up a gear.
Many businesses will be faced with the problem of simply not having enough devices to allow workers to work remotely on company-issued devices, so the decision will need to be taken about whether to allow employees to use their personal devices. Personal devices are unlikely to have the same level of protection as company-owned devices and it is much harder to control what employees do on those devices and to protect against malware that could easily be transferred onto the work network.
There is also a greater risk of shadow IT when workers are home-based. The downloading of applications and use of non-authorized tools increases risk considerably. Vulnerabilities may be introduced that can easily be exploited by cybercriminals.
Then there is the problem of having so many people accessing work networks using VPNs. Systems may not be able to cope with the increased number, which means workers will not be able to connect and work from home. IT departments must ensure there is sufficient bandwidth and licenses for VPN solutions. Those VPNs also need to be updated and patched.
These are just some of the many cybersecurity challenges for home working. The list of security concerns is very long.
Cybercriminals are Taking Advantage of a Huge Opportunity
Cybercriminals are constantly changing tactics to attack businesses and the coronavirus pandemic offers them opportunities on a silver platter. It is unsurprising that they are taking advantage. In January, phishing campaigns were launched taking advantage of fear about coronavirus. Those campaigns have increased significantly as the COVID-19 crisis has deepened. Coronavirus and COVID-19 are being used as phishing lures and to COVID-themed emails are being used to distribute malware. Cyberattacks exploiting vulnerabilities in VPNs are also increasing.
As the COVID-19 crisis worsens and lockdowns are enforced, businesses will be forced to have more workers working from home and cyberattacks are likely to continue to increase. Since shutting down the business temporarily or indefinitely simply isn’t an option for most businesses, addressing the cybersecurity challenges for remote working will soon become critical.
Addressing the Cybersecurity Challenges for Home Working
Addressing the cybersecurity challenges for home workers is likely to be difficult. Listed below are some of the steps that should be taken to prepare.
- When creating new accounts for home workers, ensure strong passwords are set and use the principle of least privilege to reduce risk.
- Enable two-factor authentication.
- Ensure workers can connect through VPNs and there are sufficient licenses and bandwidth.
- Make sure VPN software is patched and the latest version is installed. Ensure procedures are in place to keep the software updated.
- Consider disabling USB ports to prevent the use of portable storage devices. This will reduce the risk of malware infections and the risk of data theft.
- Ensure portable devices are protected with encryption. Use software solutions that lock devices in the event of theft or allow devices to be remotely wiped.
- Ensure you set up communications channels to allow remote workers to collaborate, such as teleconferencing, chat facilities, document sharing platforms, and SaaS applications. Make sure employees are aware of what can and cannot be shared via chat apps such as Slack and Google Chat.
- Ensure staff are trained on new applications, the use of VPNs, and are aware of the additional risks from remote working. Train remote workers on how to identify phishing and other cybersecurity threats.
- Ensure policies and procedures are set up for reporting threats to IT security teams. Instruct employees on the correct course of action if they believe they have fallen for a scam.
- Implement a DNS filter to prevent employees from accessing high risk websites on corporate-issued devices and block downloads of risky file types.
- Ensure email security controls are implemented to block phishing attacks and detect and quarantine malware threats.
How TitanHQ Can Help Protecting Remote Workers and Their Devices
TitanHQ has developed two cybersecurity solutions that can help businesses protect their remote workers and their networks from email and web-based threats. Being 100% cloud-based, these solutions are just as effective when employees are working remotely as they are for office workers.
SpamTitan Cloud is a powerful email security solution that protects against the full range of email threats. SpamTitan has advanced threat detection capabilities to detect known and zero-day phishing, spear phishing, malware, botnet, and ransomware threats and ensure the threats never reach inboxes. SpamTitan Cloud also scans outbound email to detect spamming and malware distribution, as well as improving protection against insider threats through tags for sensitive data.
WebTitan Cloud is a DNS filtering solution that provides protection from web-based attacks for user working on and off the network. Being cloud based, there is no need to backhaul traffic to the office to apply filtering controls. Since the filter is DNS-based, clean, filtered internet access is provided with no latency. Controls can easily be applied to restrict access to certain types of websites to prevent cyberslacking and block cybersecurity threats and malware downloads.
Both of these solutions are easy to implement, require no local clients, and can be set up to protect your employees in minutes. They are also available on a free trial if you want to evaluate the solutions before committing to a purchase.
For further information on SpamTitan Cloud Email Security and WebTitan Cloud DNS filtering and to discover how these solutions can help to protect your business and remote workers at this extremely challenging time, give the TitanHQ team a call today.
During this unprecedented time of uncertainty, the health and safety of our employees, customers, partners and their families is one of our main focuses and concerns. Team TitanHQ are fully committed to supporting our partners and customers. The benefits from our email and web security products are even more relevant and important now.
Our fantastic team has jumped at the challenge with vigor and we have mobilized our workforce so that it’s business as usual over this unusual phase. We are taking advice from the government on best practice and have a task force in place to manage our progress.
Customers and partners can rest assured that support teams will continue to be available and product teams are working as normal. If you have any questions or concerns about products, or technical support, please contact us in the usual way. The support team has been trained to be aware of special customer concerns during this period and will escalate any question to the appropriate responsible person or department.
Our new documentation and set up resource has been particularly busy during the period. You can access it here and as always our support team is waiting here: https://www.titanhq.com/support-portal/
We are aware that this is a sensitive time and we will make sure to go the extra mile to make it easier for our customers. All of us at TitanHQ wish you good health and thank you for your continued support.
Many phishing campaigns have been detected that use the novel coronavirus as a lure and now a new ransomware variant called CoronaVirus has been detected and analyzed by MalwareHunterTeam. CoronaVirus ransomware is being distributed through a malicious website masquerading as software called WiseCleaner, a tool that can be used to clean up the registry and remove duplicate files and junk files from computers. WiseCleaner is legitimate software tool, but the website used in this campaign is fake.
It is currently unclear how traffic to the website is being generated. Campaigns such as this typically use malvertising for traffic – Malicious adverts on ad networks that direct users to malicious websites. These adverts are displayed on many legitimate websites that use third party ad networks to generate extra revenue.
If a website visitor tries to download WiseCleaner from the malicious website (The genuine website is wisecleaner.com), a file named WSHSetup.exe will be downloaded. Executing this file will download two malicious payloads: CoronaVirus ransomware and the Kpot Trojan. The Kpot Trojan is an information stealer that steals a variety of credentials, including Skype, Steam, Discord, VPN, email, and FTP passwords from a variety of different applications. The Kpot Trojan steals information such as banking credentials that have been saved in browsers and can also steal cryptowallets. The executable file also attempts to download other files, although currently only two files are downloaded. The intention may well be to download a cocktail of malware.
When CoronaVirus ransomware is downloaded and executed it encrypts a range of different file types. The encrypted files are renamed using the attacker’s email address, but the original file extension is retained. A ransom note is dropped in each folder where files are encrypted.
Interestingly, the ransom demand is very low. The attackers only charge 0.08 BTC – around $50 – for the keys to decrypt files. This suggests the ransomware component of the attack is not the main aim of the campaign which is to distribute the Kpot Trojan and potentially other malware payloads. CoronaVirus ransomware may just be a distraction.
There is currently no known decryptor for CoronaVirus ransomware and it is unclear whether the attackers can – or will – supply valid keys that allow encrypted files to be recovered.
Businesses can protect against attacks such as this by ensuring they backup all of their files regularly and store the backups offline. A web filtering solution should also be implemented to prevent malicious files from being downloaded. Web filters can be configured to prevent attempts by employees to visit malicious websites and also to block downloads of risky file types such as .exe files.
For more information on web filtering and to find out how TitanHQ’s web filtering solution, WebTitan, can help to protect your business from web-based cyberattacks, give the TitanHQ sales team a call today.
There are many ways that ransomware can be downloaded onto business networks, but most commonly, ransomware attacks occur via Remote Desktop Protocol (RDP), drive-by downloads, or email.
Scans are performed to discover organizations with open RDP ports, which are then attacked using brute force tactics to guess weak passwords. Cybercriminals also add credentials from historic data breaches to their password lists.
The best way to defense against this method of ransomware delivery is to disable RDP entirely; however, RDP is often required for remote management or remote access to virtual desktops, so this may not be an option. If RDP cannot be disabled, there are steps that should be taken to make it as secure as possible.
Use of strong passwords is important to protect against brute force attempts to guess passwords. You should follow NIST advice on creating complex passwords. Passwords must be unique and not used on any other platform. Two-factor authentication should be implemented to prevent stolen credentials from being used.
You must make sure you are running the latest software versions for servers and clients. RDP connections to listening RDP ports should only be permitted through a secure VPN, and ideally, an RDP gateway should be used. You should also restrict who is permitted to login to remote desktop. Finally, you should use rate limiting to lock users out after a set number of failed attempts to enter the correct password.
Drive-By Ransomware Downloads
Drive-by downloads occur on websites controlled by hackers, either their own sites or insecure sites that have been compromised. Malicious scripts are added to the websites that download ransomware and other malware payloads onto a user’s device when they visit the malicious webpage. This method of attack does not require any user interaction, other than visiting the malicious website. That could occur by clicking a malicious link in an email, via a redirect, or even through general web browsing.
A web filter such as WebTitan is one of the best defenses against drive-by ransomware downloads. WebTitan is a DNS filtering solution that prevents end users from visiting websites known to be malicious. Rather than connecting to the website, the user will be directed to a local block page if they attempt to visit a known malicious website. WebTitan can also be configured to block downloads of risky file types such as executable files.
Ransomware is also commonly delivered via email. This could be via an embedded hyperlink to a website where a drive-by download occurs or via malicious scripts in file attachments. Protecting against email-based attacks requires a defense in depth approach, as no single solution will provide total protection against all email attacks.
An advanced email security solution such as SpamTitan should be implemented. SpamTitan scans all inbound and outbound emails and uses a variety of techniques, including machine learning, to identify and block potentially malicious emails. SpamTitan incorporates two antivirus engines that detect known malware variants and a sandbox to analyze suspicious files for malicious actions. Sandboxing protects against never-before-seen malware and ransomware variants.
End user training is also important to ensure that in the event of a malicious email reaching an end user’s inbox, it can be recognized as such. A web filtering solution will help to ensure that any attempt to visit a malicious website via a hyperlink in an email or email attachment is blocked before ransomware is downloaded.
Ransomware as a Secondary Payload
Several ransomware operators use commodity malware to deliver their ransomware payloads. The threat actors behind DoppelPaymer ransomware have been using the Dridex banking Trojan to deliver their malicious payload, while the Ryuk ransomware gang uses the TrickBot Trojan.
Even if these commodity malware infections are discovered and removed, the ransomware gangs may still have access to systems. These commodity malware infections are often viewed as relatively trivial and when these malware variants are discovered the attacks are not properly investigated. The Trojans are removed, but the ransomware operators continue to spread laterally before deploying their ransomware payloads.
In the case of TrickBot, once it is downloaded it gets to work harvesting data such as passwords files, cookies, and other sensitive information. Once the attackers have harvested all the data they can, a reverse shell is opened to the Ryuk ransomware operators who perform recon of the network and attempt to gain administrator credentials. They then use PSExec and other Windows tools to deploy ransomware on all devices connected to the network.
That is exactly what happened with the attack on the e-discovery firm, Epiq Global. The initial TrickBot infection occurred in December 2019. Access was provided to the Ryuk operators who deployed the ransomware on February 29, 2020. Prior to the deployment of ransomware, the Ryuk operators compromised computers in all 80 of Epiq’s global offices.
TrickBot and other Trojans are primarily delivered via phishing emails. SpamTitan will help to keep you protected against these Trojans and other ransomware downloaders.