Cyber Security Network Threats: Malware, SQL Injection, Phishing
A cyber security network protects computers, servers and data from people who want to break in or cause damage. To protect it, you first need to know what you are defending against. This guide describes three common cyber security network threats, malware, SQL injection and phishing, and the defences that answer each one.
Key takeaways
- Malware is software built to harm a computer or steal data, often delivered by email or a download.
- SQL injection abuses weak database code to read or change stored information.
- Phishing tricks people into giving away passwords or running malicious files.
- Layered defences and trained staff reduce the risk from all three.
Malware and how it spreads
Malware is software designed to disrupt or harm a computer, or to steal information from it. It is usually spread through an unwanted email attachment or a download that looks legitimate. Once inside, it can lock files, record keystrokes or open a path for further attacks.
SQL injection against databases
SQL stands for structured query language, the language many databases use. In an SQL injection attack, someone enters a crafted query into a web form or address, and a poorly written application passes it straight to the database. The attacker may then read, change or delete records that should have been private.
The fix lies mainly in how applications are written, with checked inputs and parameterised queries, supported by regular testing.
Phishing and stolen passwords
Phishing uses a message that looks genuine to push someone into sharing a password or clicking a harmful link. Because it targets people, not machines, technical controls alone do not stop it. Staff training helps, and so do multi-factor sign-in and email filtering. See cybersecurity awareness training for supply chain staff for one way to build that habit.
Network defences that answer each threat
| Threat | Typical defence |
|---|---|
| Malware | Endpoint protection, email filtering, prompt patching and network monitoring |
| SQL injection | Input checking, parameterised queries, a web application firewall and regular testing |
| Phishing | Email filtering, staff training and multi-factor sign-in |
Our guide to network security components explains how firewalls, intrusion detection, SIEM and encryption fit together.
Protecting your cyber security network with Suraj Informatics
Suraj Informatics provides cyber security network services that combine monitoring, threat intelligence and vulnerability management. Contact us to review the threats that matter most for your network.
Network threats: common questions
What is a cyber security network?
It is the set of tools, rules and monitoring that protects a computer network and the data on it from attack.
What is the most common way malware arrives?
Usually an email attachment or a download that looks legitimate.
Can a firewall stop SQL injection?
A web application firewall can block many attempts, but the application code should also be written to handle input safely.
How can staff avoid phishing?
By checking the sender, not clicking unexpected links, and reporting suspicious messages. Multi-factor sign-in limits the damage if a password is stolen.
Talk to our cyber security team
Tell us about your network and we will point out the threats and controls to look at first.
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