Every organization is susceptible to cyberattacks, and when they do happen, there is a fine line between saving your network security and being infected by malicious threats. Every second of preventive action counts to prevent an attack from spreading rapidly. As of now, many companies, including enterprises and small to medium-sized businesses, are increasingly aware of the need to develop a cybersecurity incident response plan to deal with attacks. Having an incident response plan in place after an incident will reduce costs and will not damage a company’s reputation. Indeed, there are many things to consider that must fit together to execute a seamless incident response. Some organizations, especially those that have not faced cyber threats, do not know where to start, let alone what to prioritize, which is why they often seek out certified incident handlers for help.
What is the incident response to cyberattacks?
A security incident is a warning that there may be a data breach on your computer. Sometimes, the warning could also be that your security breach has already occurred. A computer security incident can also be considered a threat to your computer's relevant policies. Examples of computer security threats/incidents include malicious attacks, which include viruses and worms.
How should you respond to a security incident?
The incident response lifecycle consists of five vital steps for incident handling. For incident response to be successful, security teams must follow a well-organized approach to any live incident.
What are the five steps of incident response?
The five steps of incident response are summarized below:
Step 1: Preparation
Preparation is crucial to effective incident response. Even the best security teams cannot deal with a security breach without pre-established guidelines. Therefore, a sound plan must be in place in advance to take care of any incident that may occur at some point. Preparation is the first step in dealing with a security attack.
Get the right people with a lot of experience. Designate a leader for the IRS team who will be responsible for each activity. The leader should have direct communication with the management team to make critical decisions with immediate effect.
Step 2: Identification
The focus of this step is to monitor, identify, notify, and report any security incidents that have occurred.
The incident response team should be able to identify the source of a security breach. Your IR team should understand the various event indicators, such as anti-malware programs, file integrity checking software, system and network administrators, and more.
Step 3: Route and analysis
A lot of work goes into this phase. Many resources must be used to obtain data from tools and systems for further analysis and identification of breach indicators. At this step, a team should have in-depth skills and knowledge of live incident responses.
Until the incident is resolved, it is difficult to ascertain the extent of the damage. Therefore, analyze the cause of the incident. treat the incident as serious and respond quickly.
Step 4: Limitation
Containment is one of the most critical steps in incident response. The methods used in this step rely solely on the intelligence and breach indicators obtained during the testing and analysis step. Containment is also about reducing the damage of an incident and isolating affected systems on a network.
Once the IR team identifies an incident, it must be contained. Containing the incident may include disabling network access to the internet so that infected computers are quarantined. You may also need to reset the passwords of affected users.
Step 5: Post-incident activity
This step includes proper documentation of the information used to prevent future similar incidents.
It is essential to notify affected parties so that they can be protected from leaks of personal or financial data.
Learn from the incident to prevent future cyberattacks. You should perform post-incident activities, such as teaching employees how to avoid phishing scams and adding technologies that can manage and monitor threats.
These 5 steps are critical for addressing security incidents within an organization.
