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There is no such thing as perfect cybersecurity, so as business and information security professionals, we accept that mistakes will occur, and risks will exist. Your business is on a journey to scale, and in turn your security program will continue to evolve. But, and it’s a big BUT, that doesn’t mean we shouldn’t develop robust strategies, harden your defenses and prepare for emergency incident response situations. It’s your responsibility to take proactive steps to ensure your team, and entire organization are prepared to address a serious security breach or incident.
While you’re considering your emergency preparedness plans, keep in mind the top 5 mistakes to avoid in digital forensics and incident response (IR) that every IT leader should know…
A comprehensive cybersecurity and incident response plan requires specialized expertise, organizational commitment, disciplined personnel and layers of modern tools to provide defense in depth. But even sophisticated organizations can make mistakes when creating an incident response plan like failing to consider and cover the entire threat surface, intentionally or inadvertently maintaining out-of-scope devices, keeping services externally exposed, treating insecure behavior from executives as necessary exceptions or simply introducing defense solutions too slowly.
Incomplete implementations of tools and allowing exceptions without compensating controls lead to issues within environments.
When developing your incident response plan, ask yourself:
The unfortunate reality is that at some point you’ll have to deal with a malicious event or full-blown cybersecurity incident. Maybe configuration or patching issues will leave gaps, a laptop will be misplaced, a phishing attempt will succeed, or a sophisticated attack will break through.
The prudent approach to risk management is to accept this unwelcome truth and prepare your organization, because with the right processes and systems in place you can at least limit the frequency, reduce the magnitude and be aware of cybersecurity incidents. (What you don’t know most definitely can hurt you.)
Time is of the essence when a cybersecurity incident occurs. Delays negatively impact containment and recovery activities and can give threat actors time to destroy evidence. Failing to have an incident response provider at the ready and decision paralysis are two major causes of delays that impact an organization’s ability to respond to a cybersecurity incident.
Having an Incident Response provider, on retainer, ensures you have someone to call when an incident occurs, and you have an incident response playbook in place that you can follow.
The alternative requires you to pick up the phone, reach out to different providers, initiate conversations and negotiate contracts and legal terms during a period of time characterized by chaos and panic.
It is crucial during incident response to designate someone within your organization with sufficient decision-making authority to enable and enforce timely responses. Avoid committees, as they create dangerous delays and lead to very conservative, least-objectionable thinking at a time when decisiveness is paramount.
Additionally, ensure the designated person is willing to make potentially tough decisions (for instance, taking customer services offline to contain an incident) and has real authority within the organization. An incident is not the time to debate power dynamics and to get pulled into political discussions, nor is it the time to discover that people feel empowered to disobey the instructions because they came from the “wrong” person.
Industry and regional regulations as well as contractual notification requirements impose specific obligations upon your organization, and it’s crucial you understand them.
In any relevant agreement, or piece of regulation, a “breach” should be defined with legal and contractual meaning, as well as implications. An incident should not be labeled as such until the specific conditions are met. Again, it’s important to understand the regulatory and contractual requirements you must abide by, and be consistent in your approach, so you can reserve the term “breach” for incidents that meet the criteria, thereby avoiding unnecessary notifications and consequences.
Furthermore, your Incident Response plan should clearly identify who within your organization has the authority to label an incident a breach.
Failing to properly understand your notification requirements can lead to two follow-on mistakes:
Both mistakes can cause significant damage. To avoid such errors, your organization needs to be keenly familiar with two sets of notification requirements relating to cybersecurity incidents:
While many security breach notification regulations and requirements contain similar components, there can be important differences. Keep in mind, as security breaches rise in frequency and prominence, regulations and contractual obligations are changing, which requires organizations to stay up to date.
Digital forensics evidence is vital to many aspects of Incident Response and litigation support. Inadvertent destruction of evidence and preventing the incident responder from accessing evidence are two common challenges that hamper incident response.
In the rush to contain and clean up a cybersecurity incident, it’s common for well-intentioned personnel to destroy the digital forensics evidence (for instance by rebuilding compromised assets). Unfortunately, doing so eliminates crucial information that the incident reponse team needs to perform digital forensic analysis, to determine the full incident scope and to complete their end-to-end incident management.
Make sure the division of responsibilities between your internal team and your IR provider is clear, and unambiguously identify who has the authority to make decisions that can impact evidence. That way, you won’t accidentally destroy information your incident responder needs to fulfill their role.
During the course of IR, it’s entirely possible that your Incident Response provider will need access to sensitive systems and information. For example, in the case of a business email compromise an Incident Responder may require complete access to your email systems (Office/Outlook, Gmail, etc.).
To prevent confusion during a cybersecurity incident, it’s important the Incident Response procedures clearly explain which systems the IR provider can access and to ensure that all personnel involved (for instance, the email administrator) are aware.
Cybersecurity incidents can compromise personal and business data, severely impact operations and lead to legal consequences. When an incident occurs, it’s not the time to start planning. Or panicking. It’s imperative your organization plan ahead and establish a comprehensive Emergency Preparedness plan, outlining your Incident Response playbooks.
Both Managed Detection and Response (MDR) and Incident Response (IR) services are vital parts of an overall cybersecurity program, augmenting your response capability, and ensuring your organization can detect, respond to and recover from incidents.
To learn more about how eSentire’s Managed Risk Program and Managed Detection and Response services can better prepare you for a cybersecurity incident, contact us https://www.esentire.com/get-started.
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eSentire is the Authority in Managed Detection and Response, protecting the critical data and applications of 1200+ organizations in 75+ countries from known and unknown cyber threats. Founded in 2001, the company’s mission is to hunt, investigate and stop cyber threats before they become business disrupting events. Combining cutting-edge machine learning XDR technology, 24/7 Threat Hunting, and proven security operations leadership, eSentire mitigates business risk, and enables security at scale. The Team eSentire difference means enterprises are protected by the best in the business with a named Cyber Risk Advisor, 24/7 access to SOC Cyber Analysts & Elite Threat Hunters, and industry-leading threat intelligence research from eSentire’s Threat Response Unit (TRU). eSentire provides Managed Risk, Managed Detection and Response and Incident Response services. For more information, visit www.esentire.com and follow @eSentire.