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Sophos:A guide to Threat Detection and Response in the real world
Posted On Jan 14, 2021Sophos Threat Detection and Response (TDR) is a technique that helps security operators to identify and neutralize threats before they cause damage or become a violation.
We will take a step-by-step look at what TDR is all about in this first of a series of articles on the subject, from the main components and investigative process, to why it matters. Subsequent papers may go through more comprehensive components.
Why do we need TDR?
For cybersecurity teams, it is extremely difficult to detect, investigate, and respond to cyber threats through operating environments and to do so efficiently and effectively.
Adversaries have become stealthier as the threat environment has changed, adopting sophisticated avoidance strategies to avoid detection by security technologies.
Native operating system tools, or open-source or freeware attack tools, are also commonly used, enabling them to carry out their malicious activities without alerting the cybersecurity team.
These attacks are also guided by human operators who, if they meet an obstacle, are able to test and try various options and travel quickly in unexpected directions.
By checking for unusual incidents, irregularities, and trends in daily life, threat hunters and researchers discover these secret adversaries and examine them to see whether they are malicious.
Automated security intelligence systems, including AI-guided detection, complement their human intuition. Together, in a layered next-generation protection architecture, they form a strong line of defense.
Threat hunters and analysts do not stop discovering the threat, working to minimize and neutralize it with colleagues. It's TDR here.
The Framework of the TDR
Cybersecurity borrows heavily from the principles of the military and TDR is no exception. For example, the Sophos threat hunting and response investigative system is based on the military principle known as the OODA loop: Observe, Orient, Determine, Act.
This system helps hunters and observers of threats to act in a clear, organized way and ensure that nothing is missed.
• Note: what do you see in the data?
Orient: what is the context, the conduct, how are known attack methods, techniques, and procedures (TTPs) mapped against it?
Decide: is this suspicious, malicious, or benign?
Act: mitigate, neutralize, and join the loop again
Danger hunters and researchers create an image of what is happening within the system by implementing the framework levels, assessing if it is malicious, and what action needs to be taken.
TDR's five main elements
There are five main TDR elements that underpin the different phases of the system. Let's take each of them more closely into account.
2. Compilation of security threats, alarms, and detections
Data is the fuel that fuels danger hunting and analysis: without the right type, number, and accuracy of signals, it is incredibly difficult for defense operations teams to accurately identify potential attack signs.
3. Prioritising the signals that matter
A vital aspect of defense operations is threat identification, but it is just the first of a multi-step, human-led phase that involves confirmation, analysis, and threat response (neutralization).
4. Inquiries
When the main signs have been isolated, it is time to provide insight and assess what you have learned in the belief of malicious or benevolent activity towards market structures and models to construct towards a trust level.
5. Measure
It's a huge one here. You need to do two things until you have decided that you are dealing with a threat, and they are equally important.
The first is to minimize the acute threat, while the second is to note that you are probably treating merely a symptom of the attack, and the root cause also needs to be tracked down and neutralized. Without impairing the capacity to do the second, the first must be done. As a golden partner of Sophos, we can offer you the best Cyber Security facilities.
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