What is ransomware? Well, it’s a type of malware that specialises in encrypting the victim’s data and demands a ransom for a decryption key which may or may not work. If the victim fails to pay, their data could be sold or published online. More worryingly, if the victim pays, their data could still be sold or published online, prolonging the agony. Common ransomware families include REvil, Locky, Wannacry, Cerber, NotPetya, Maze and Darkside.
Why is Ransomware Becoming more Widespread?
Increased digitisation, remote working, accelerated adoption of cloud computing and growth in IoT devices, have expanded the attack surface for threat actors – offering more vulnerabilities that can be exploited. Launching a ransomware attack is a relatively easy and low-risk way to make money for cyber-criminals. Threat actors are usually outside the jurisdiction where the attack takes place and are typically protected by the absence of extradition treaties between the country where the crime occurred and the country from where the attack was launched. As well as posing a remarkably low risk to the attacker the rewards from a successful ransomware attack are potentially very large. Ransomware as a service (RaaS) kits can be purchased on the dark web for a few hundred dollars and if used repeatedly are likely to find at least one victim. Cryptocurrencies such as bitcoin make it virtually impossible for law enforcement authorities to track ransom payments. Consequently, the rapid growth in ransoms combined with the increasing risk of successful ransomware attacks is leading to banks stocking up on bitcoin. This allows their customers to quickly pay ransoms.
How to Mitigate the Risks?
Companies will not be able to completely eliminate the risk of ransomware attacks. They can, however, mitigate the risk of these attacks with a zero-trust approach to cybersecurity, renewed focus on training and awareness programs, and well-prepared and rehearsed incident response plans.
Rigorously applying the principle of least privilege will make it harder for threat actors to gain the credentials that they need to move laterally within systems and networks. Segmenting networks and isolating workloads will limit the blast radius of attacks. Training and awareness campaigns will make employees less likely to download malware via phishing attacks or other social engineering activities. Ensuring that all sensitive data is classified and encrypted will make double extortion more difficult – a miserable scenario where the victim pays a ransom for a decryption key and is then asked to pay a further ransom for the dubious promise that stolen data will not be leaked.
Protecting against supply chain ransomware attacks, such as the Kaseya breach, is fiendishly difficult. In the case of Kaseya, attackers identified a zero-day vulnerability in its VSA IT management and monitoring tool. An update was then infected with ransomware and shared with managed service providers, who, in turn infected their customers with the ransomware.
Rehearsed incident response plans that prepare for a successful ransomware attack are essential controls against such threats. A critical component of such a plan is backup and recovery. Backups are increasingly being targeted in well-orchestrated attacks so companies must find ways of ensuring that their data is stored in at least one immutable destination. This means that they can recover quickly – often almost instantly if the process is automated.
If companies follow cybersecurity best practices such as those outlined above, they should be able to manage ransomware risk and the misery associated with these attacks. If a ransomware attack occurs, well-prepared companies will be able to recover rapidly and be comfortable in the knowledge that the data which has been stolen is of little or no value to the attackers.
Switching to an alternative video conferencing platform will not necessarily offer greater levels of security as privacy is typically not a strength of any collaboration platform. Collaboration platforms tend to tread a fine line between a great experience and security. Too much security can cause performance and usability to be impacted negatively. Too little security, as we have seen, allows hackers to find vulnerabilities. If data privacy is critical for a meeting, then perhaps collaboration platforms should not be used, or organisations should not share critical information on them.
Protect all Cloud Workloads
In today’s remote working paradigm, cloud computing is being used more than ever. This frequently exposes organisations to risks that are not adequately mitigated.
Organisations typically need to manage a mix of on-premises technology together with multiple clouds, which are often poorly integrated. These complexities are compounded by the increasing risk from cyberattacks associated with cloud migration and hybrid cloud implementations. In cloud environments, the leading cybersecurity risks include insecure interfaces and APIs, data breaches and data loss, unauthorised access, DDoS attacks, and a lack of a unified view of assets.
Protection requirements for securing hybrid multicloud environments are evolving rapidly. In addition to tightening up endpoint security, organisations must also place greater emphasis on cloud workload protection. Cloud security solutions need to offer a unified and consistent view across all physical machines, virtual machines, serverless workloads and containers, used by an organisation.
Amend Incident Response Plans
It is the containment of breaches that often determines the success of security policies and procedures. Basic cyber hygiene as well as changes to IT architecture, such as micro segmentation, play an essential role in breach containment. But incident response plans also need to be made relevant to the current pandemic scenario.
Employees and IT teams are now working in a completely different environment than envisaged by most incident response plans. Existing plans may now be obsolete. At the very least, they will need to be modified. Usually, incident response plans are designed to respond to threats when most employees are operating in a corporate environment. This clearly needs to change. Employees need to be trained in the updated plan and know how to reach support if they believe that a security breach has occurred in their remote location.
Critically, new alert and warning systems need to be established, which can be used by employees to warn of threats as well as to receive information on threats and best practices.
Organisations are struggling to keep the lights on. In this battle to remain operational, cybersecurity has been taking a back seat. This cannot last for long as the deluge of new vulnerabilities is creating easy pickings for attackers. Cyber hygiene, endpoint security, cloud security, security policies and incident response plans must be continually reviewed.
This blog is based on Andrew Milroy’s recent report titled “Cybersecurity in the COVID-19 Era”.
Click here to download the full report ?
4/5 (2) A report published by PWC last year states that “While CIOs and CISOs can take care of the technological aspects and in some cases compliance, the business risk, which is now apparent after the emergence of endless breaches in large conglomerates, can best be understood and managed in the boardroom.”
While I agree that cybersecurity is both an operational and business risk, the question of understanding the threat landscape and the risk exposure/risk position of the company falls on both parts of the business. The Board is responsible for the exposure and financial remediation of cyber risk, whereas the IT management is more operationally responsible for prioritisation of actions and remedies. But they need to be able to communicate on this topic together from both sides of the equation. Ecosystm research finds that 98% of global organisations involve the Board to drive their cybersecurity vision, while 88% of organisations look to their IT teams for operational management.
So, where do these two parties meet? How does the risk position of the company get communicated to both parties in such a way that they can both take the necessary actions and prioritise the resource allocation?
Dashboards for Discussion
This is where the discussion on cyber risk dashboards comes up. It is not a new topic, but some of the more recent solutions introduced in the market move beyond penetration testing to really highlighting the risk posture of the business and where resources should be allocated, as well as where the business compares to others in their industry. I will give a specific example of one such approach a bit later in this blog post.
I find the gamification aspect (e.g. industry comparison) a real driver for the Boardroom, as it allows them to position their risk profile against others to the relevant stakeholders and regulators of the business. Actionable metrics that can also be compared to others gives a feeling of control over a situation that frequently lacks control boundaries.
Maturity models vs. risk profiles
In the PwC article I mentioned earlier [written last year by Sivarama Krishnan], the focus was on actions the Board can take, which include the usual discussions of cyber insurance, data handling policies, reporting structures and a tie into the strategy of the business overall. But at a top-level, setting these kinds of priorities can only work when you have some form of metric checking to assess how operationally these kinds of strategic decisions are working for the business.
Figure 1: Barometric Reporting Scale
Source: PwC, March 2019
Having a reporting scale that is not only relevant and measurable but also actionable is key to tying the strategic decisions to the operational activities and overall resource and time allocations. You could use a cyber risk strategy framework, such as this one shown in Figure 1, but it needs to be fed with real-time information on the risk position of the business.
Creating actionable metrics
I mentioned previously that there is a need for solutions that create a communication point between the Board and the operational IT teams as to what risk position exists for the business, and how they compare to others in their industry.
Dashboards that create an overview of the risk portfolio exist, but they do not always tie to specific financial impacts to the business. Integrated risk management platforms, such as the one from CyberSaint Security, prioritise cybersecurity as a business risk and give access to the Board to have the ability to drill down into their compliance and risk posture across business units, asset types, projects and regions.
But one of the more concerning aspects of cybersecurity recently is ransomware, which locks up operations until a ransom is paid. One such solution that focuses specifically on the financial impact on the bottom line of ransomware comes from RiskSense and was launched last month. As a background, the RiskSense Platform utilises machine learning, risk-based scoring and analytics combined with technology-accelerated penetration testing, and then identifies and prioritises remediation of critical vulnerabilities that place organisations at risk.
Given the concern at the Board level on Ransomware, RiskSense decided to focus on the very vulnerabilities that make ransomware attacks possible. They recently announced their RiskSense Ransomware Dashboard which reveals all assets within the IT structure that are at risk to active exploits used by ransomware in the wild. This Dashboard examines the vulnerabilities used by ransomware based on risk factors including the presence of dangerous remote code execution (RCE) and privilege escalation (PE) capabilities, as well as vulnerabilities that are “trending” to narrow and identify which should be prioritised for immediate remediation.
Figure 2: RiskSense Executive Dashboard
Source: RiskSense, January 2020
In my opinion, this specific example highlights the two unique features of the RiskSense Ransomware Dashboard. For IT management, it is its ability to contextualise the threat landscape to highlight priorities and position the current security posture of the company. And for the Board, it is to compare the situation of the company to others in their industry to benchmark within the industry domain how effectively their cybersecurity efforts have been deployed. It puts the security team in more of an offensive (vs. defensive) mode towards its cybersecurity efforts and outcomes. And it allows the IT team to be able to communicate the risk position of the business to the Board with a series of actionable steps to address the vulnerability.
So from a communications aspect, and that of a shared resource to view vulnerabilities and actions, the introduction of the RiskSense Ransomware Dashboard makes financial risk sense, if you will pardon the pun.
For both regulatory and financial reasons, Board-level executives need to have cyber risk information for business decisions. This means having access to drill-down capabilities that show gap analyses from the category to the control level for various frameworks or standards. This might include either the NIST Cybersecurity Framework, CIS Critical Security Controls, ISO27002 or various privacy standards such as the NIST Privacy Framework and emerging California Consumer Privacy Act (CCPA).
Dashboards that tie to these frameworks do exist, but they need to be able to be used for communication of actionable activities and resource allocation, not just as a reporting mechanism for regulatory bodies and shareholders. The RiskSense Ransomware Dashboard discussed above is one good example of making transparency actionable and comparable. We need more of those in the industry to keep the communication flowing.