If I had to single out an individual development that elevated the sophistication of cybercrime by order of magnitude, it would be sharing. Code sharing, vulnerabilities sharing, knowledge sharing, stolen passwords and anything else you can think of. Attackers that once worked in silos, in essence competing, have discovered and fully embraced the power of cooperation and collaboration. I was honored to present a high-level overview on the topic of cyber collaboration a couple of weeks ago at the kickoff meeting of a new advisory group to the CDA (the Cyber Defense Alliance), called the “Group of Seven” established by the Founders Group. Attendees included Barclays’ CISO Troels Oerting and CDA CEO Maria Vello as well as other key people from the Israeli cyber industry. The following summarizes and expands upon my presentation. TL;DR - to ramp up the game against cyber criminals, organizations and countries must invest in tools and infrastructure that enable privacy-preserving cyber collaboration.
The Easy Life of Cyber CriminalsThe amount of energy defenders must spend to protect, vs. the energy cyber criminals need to attack a target, is far from equal. While attackers have always had an advantage, over the past five years the balance has tilted dramatically in their favor. Attackers, to achieve their goal, need only find one entry point into a target. Defenders need to make sure every possible path is tightly secured – a task of a whole different scale. Multiple concrete factors contribute to this imbalance:
- Obfuscation technologies and sophisticated code polymorphism that successfully disguises malicious code as harmless content rendered a large chunk of established security technologies irrelevant. These technologies were built with a different set of assumptions during what I call “the naive era of cyber crime.”
- Collaboration among adversaries in the many forms of knowledge and expertise sharing naturally speeded up the spread of sophistication/innovation.
- Attackers as “experts” in finding the path of least resistance to their goals discovered a sweet spot of weakness. A weakness that defenders can do little about – humans. Human flaws are the hardest to defend as attackers exploit core human traits such as trust building, personal vulnerabilities and making mistakes.
- Attribution in the digital world is vague and almost impossible to achieve, at least as far as the tools we have at our disposal currently. This makes finding the cause of an attack and eliminating it with confidence tough.
- The complexity of IT systems leads to security information overload which makes timely handling and prioritization difficult; attackers exploit this weakness by disguising their malicious activities in the vast stream of cyber security alerts. One of the drivers for this information overload is defense tools reporting an ever growing amount of false alarms due to their inability to identify malicious events accurately.
- The increasingly distributed nature of attacks and the use of “distributed offensive” patterns by attackers makes the defense even harder.
Rationale for CollaborationCollaboration, as proven countless times, creates value that is beyond the sum of the participating elements. This applies also to the cyber world. Collaboration across organizations can contribute to defense enormously. For example, consider the time it takes to identify the propagation of threats as an early warning system – the time span decreases exponentially in proportion to the number of collaborating participants. This is highly important to identify attacks targeting mass audiences more quickly as they tend to spread in an epidemic like patterns. Collaboration in the form of expertise sharing is another area of value – one of the main roadblocks to progress in cyber security is the shortage of talent. The exchange of resources and knowledge would go a long way in helping. Collaboration in artifact research can also reduce the time to identify and respond to cybercrime incidents. Furthermore, the increasing interconnectedness between companies as well as consumers means that the attack surface of an enterprise – the possible entry points for an attack – is continually expanding. Collaboration can serve as an important counter to this weakness. A recent phenomenon that may be inhibiting progress towards real collaboration is the perception of cybersecurity as a competitive advantage. Establishing a robust cyber security defense presents many challenges and requires substantial resources, and customers increasingly expect businesses to make these investments. Many CEOs consider their security posture as a product differentiator and brand asset and, as such, are disinclined to share. I believe this to be short-sighted due to the simple fact that no-one is safe at the moment; shattered trust trumps any security bragging rights in the likely event of a breach. Cyber security needs to progress seriously to stabilize, and I don’t think there is value in small marketing wins which only postpone development in the form of collaboration.
Modus OperandiCyber collaboration across organizations can take many forms ranging from deep collaboration to more straightforward threat intelligence sharing:
- Knowledge and domain expertise – Whether it is about co-training or working together on security topics, such partnerships can mitigate the shortage of cyber security talent and spread newly acquired knowledge faster.
- Security stack and configuration sharing – It makes good sense to share such acquired knowledge although it is now kept close to the chest. Such collaboration would help disseminate and evolve best practices in security postures as well as help gain control over the flood of new emerging technologies, especially as validation processes take extended periods.
- Shared infrastructure – There are quite a few models where multiple companies can share the same infrastructure which has a single cyber security function, for example, cloud services and services rendered by MSSPs. While the current common belief holds that cloud services are less secure for enterprises, from a security investment point of view, there is no reason for this to be the case and it could and should be better. A big portion of such shared infrastructures is hidden in what is called today Shadow IT. A proactive step in this direction is a consortium of companies to build a shared infrastructure which can fit the needs of all its participants. In addition to improving the defense, the cost of security would be offset by all the collaborators.
- Sharing real vital intelligence on encountered threats – Sharing useful indicators of compromise, signatures or patterns of malicious artifacts and the artifacts themselves is where the cyber collaboration industry is currently at.
Challenges on the Path of CollaborationCyber collaboration is not taking off at speed we would like, even though experts may agree to the concept in principal. Why?
- Cultural inhibitions – The state of mind of not cooperating with competition, the fear of losing intellectual property and the fear of losing expertise sits heavily with many decision makers.
- Sharing is limited due to the justified fear of potential exposure of sensitive data – Deep collaboration in the cyber world requires technical solutions to allow the exchange of meaningful information without sacrificing sensitive data.
- Exposure to new supply chain attacks – Real-time and actionable threat intelligence sharing raises questions on the authenticity and integrity of incoming data feeds creating a new weakness point at the core of the enterprise security systems.
- Before an organization can start collaborating on cybersecurity, its internal security function needs to work correctly – this is not necessarily the case with a majority of organizations.
- The brand can be put into some uncertainty as the impact on a single participant in a group of collaborators can damage the public image of other participants.
- The tools, expertise, and know-how required for establishing a cyber collaboration are still nascent.
- As with any emerging topic, there are too many standards and no agreed upon principles yet.
- Collaboration in the world of cyber security has always raised privacy concerns within consumer and citizen groups.
Technical Challenges in Threat Intelligence SharingEven the limited case of real threat intelligence sharing raises a multitude of technical difficulties, and best practices to overcome them have not yet been determined:
- How to achieve a balance between sharing actionable intelligence pieces which must be rich to bee actionable vs. preventing exposure of sensitive information.
- How to establish secure and reliable communications among collaborators with proper handling of authorization, authenticity, and integrity to make sure the risk posed by collaboration is minimized.
- How to verify the potential impact of actionable intelligence before it is applied to other organizations. For example, if one collaborator broadcasts that google.com is a malicious URL then how can the other participants automatically identify it is not something to act upon?
- How do we make sure we don’t amplify the information overload problem by sharing false alerts to other organizations or some means to handle the load?
- Once collaboration is established, how can IT measure the effectiveness of the efforts being invested vs. resource saving and added protection level? How do you calculate Collaboration ROI?
- Many times investigating an incident requires a good understanding of and access to other elements in the network of the attacked enterprise; collaborators naturally cannot have such access, which limits their ability to conduct a cause investigation.