Emergency response and management technology for network security incidents

Emergency response and management technology for network security incidents

With the advent of the information age, the network has become the main platform for people's production, life and communication. However, network security issues are inevitable, and network security incidents such as various network attacks, network viruses, and ransomware emerge in endlessly. These events have brought great losses and threats to individuals, businesses, organizations and countries. Therefore, network security emergency response and management are important means to ensure network security.

1. Classification of network security events

Network security events can be divided into the following four categories:

1. Network attack: refers to network attacks, Cracking, DoS /DDoS, Sniffing, Worm, Malware, Phishing and other methods to attack, destroy, detect and steal computer systems, network equipment and data.
2. Network virus: refers to a virus that uses computer networks to spread. It infects victims through emails, web pages, uploads and downloads, etc., and automatically replicates and spreads after infection.
3. Ransomware: refers to a type of software that carries out extortion through the Internet. It infects computer terminals, encrypts user files, and requires users to pay a ransom to decrypt the files.
4. Leakage incident: Refers to the act of leaking confidential information to the outside through the Internet or deliberately making circumstantial steps to obtain confidential information.

2. Principles of network security emergency response and management

The principles of network security emergency response and management are as follows:

1. Quick response: in network security After an incident occurs, emergency response must be carried out as quickly as possible to minimize losses and recover as quickly as possible.
2. Comprehensive analysis: After identifying a network security incident, a comprehensive and systematic analysis must be conducted to analyze the degree of harm of the incident, the cause of the incident and the characteristics of the incident propagation, etc., to provide a basis for subsequent emergency response.
3. Risk assessment: Risk assessment is to evaluate the possibility, threat level and impact of network security incidents on the business to provide a basis for risk response.
4. Emergency handling: Emergency handling is the core content of responding to network security incidents, including prior preparation (prevention), emergency response (response) and post-event assessment (review).

3. Steps of network security emergency response and management

The steps of network security emergency response and management are as follows:

1. Formulation of emergency response plan: An emergency response plan is a document developed to coordinate various resources and take various emergency measures when a cybersecurity emergency occurs. The plan must describe details such as the organizational structure of the response team, response procedures, and contingency conditions for unexpected situations.
2. Confirmation and analysis of events: When a network security incident occurs, it is necessary to quickly confirm the event, including confirming details such as the course of the event, the degree of threat, and the scope of impact. The purpose of analyzing events is to better respond to emergencies. The analysis includes the source of the event, the type of threat, the development trend of the event, and the possible purpose.
3. Emergency response: After confirming the incident, the response team initiates an emergency response plan and takes rapid response measures, such as blocking attacks, repairing vulnerabilities, restoring data, restoring columns, etc.
4. Post-event summary and review: After the incident is handled, it is necessary to conduct summary and review work to identify problems and make suggestions for improvement so that the emergency response to the next incident can be more complete.

4. Technical means of network security emergency response

The technical means of network security emergency response include the following categories:

1. Network monitoring: network events Monitoring is a technical means that can help security administrators detect abnormalities in the network in a timely manner. By installing load balancing, clustering, firewall and other equipment on the network, all data flows on the network can be detected. By analyzing the data flows, abnormal or unusual traffic on the network can be discovered in a timely manner.
2. Security protection: Security protection is a method that uses technical means to build a multi-level and multi-dimensional protection system to prevent network attacks and virus intrusions. Common security protection methods include intrusion detection, vulnerability scanning, access control, firewalls, network isolation, etc.
3. Data backup: Data backup refers to backing up important data. When a network security incident occurs, the system can quickly and effectively restore the original data state by restoring the data. Data backups need to be performed regularly to ensure that data can be effectively restored when needed.
4. Emergency response tool: Emergency response tool is a tool that assists network security emergency response and management through technical means, including vulnerability scanning, network listening, intrusion detection, malicious program removal, etc.

5. Case analysis of network security emergency response and management

1. Cyber ​​attack incident: In 2018, a well-known bank in the United States suffered a cyber attack. The attackers attacked the bank through large-scale CSRF and DDoS attacks. The bank's security team chose rapid response and comprehensive analysis, and quickly identified the source and means of the attack, and took corresponding emergency measures to stop the attack as soon as possible.
2. Network virus incident: In April 2019, a world-renowned airline suffered a malware attack. The virus infected the company's computer suite on a large scale through email, causing the company's business system to paralyze. In response to this incident, the company adopted emergency measures of rapid response and comprehensive analysis, and issued announcements to the outside world in real time to ensure the orderly operation of its business.
3. Ransomware incident: In May 2017, the world was attacked by WanNaCry ransomware, with a large number of victims. In response to this incident, many companies took emergency measures to promptly upgrade their firewalls and update patches, and promptly released the situation to the public to remind the public to take precautions.
4. Leaks: In 2015, the U.S. Federal Department of Personnel data leak scandal was exposed, with as many as 21 million victims. In response to this incident, the Federal Ministry of Personnel took effective defensive measures to protect the rights of the victims.

6. Summary

Cybersecurity emergency response and management are an indispensable part of modern network security work. When responding to network security incidents, it is necessary to make quick judgments and take corresponding emergency measures. At the same time, it is also necessary to gradually improve the capabilities and emergency response skills of security workers to ensure network security and operational stability.

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