What is a Cyber Attack?

Last Updated : 1 Dec, 2025

A cyber attack is an attempt by hackers to steal, damage, or disrupt computer systems, networks, or data, often to access sensitive information, cause disruptions, or demand ransom.

  • Targets individuals, businesses, and governments.
  • Aims to steal data, cause disruption, or demand ransom.
  • Often begins through malicious emails, links, or attachments.
  • Verifying email headers and avoiding suspicious links helps prevent attacks.
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Working of Cyber Attack

Cyber attacks can be divided into two categories:

1. Untargeted Cyber Attack

These attackers focus on many devices, users, or services to steal data. It includes:

  • Phishing: Sending emails to many people to steal bank details or lure them into clicking fake websites.
  • Ransomware: Attackers lock or steal data and demand payment to restore access.
  • Scanning: Attackers randomly target devices without selecting a specific person.

2. Targeted Cyber Attack

These attacks focus on a specific individual, organization, or system. It includes:

  • Spear-Malware Emails: Sending a crafted email with malware to a specific person, such as a company executive.
  • Focused Credential Theft: Tailoring messages or tools to steal confidential data from a particular target.
  • Custom Exploits: Using specialized tools designed only for the chosen victim or organization.

Types of Cyber Attacks

Here are some types of cyber attacks:

Cyber-Attack

1. Phishing Attack

A cyber attack where hackers send fake emails pretending to be legitimate sources to steal sensitive information.

  • Tricks users into clicking fake links
  • Steals login details or financial data
  • Often sent to many people at once

2. Whale Phishing Attack

A targeted phishing attack aimed at high-level executives.

  • Targets CEOs, founders, and senior officials
  • Emails look extremely professional
  • Aims to steal valuable business information

3. Spear Phishing Attack

A highly targeted phishing attack focused on a specific person or organization.

  • Personalized messages
  • Contains credible details to gain trust
  • Leads victims to fake websites to steal data

4. Password Attack

An attack where hackers attempt to crack or guess a user’s password.

  • Uses brute-force or dictionary methods
  • Exploits weak or predictable passwords
  • Allows attackers to access accounts or systems

5. Malware Attack

A cyber attack involving malicious software that damages systems or steals data.

  • Includes viruses, worms, and spyware
  • Enters through downloads or email attachments
  • Can steal, delete, or corrupt data

6. Web Attacks

Attacks that target data stored on web servers or websites.

  • Focus on online payment systems
  • Attempts to steal customer information
  • Exploits website vulnerabilities

7. DOS Attack (Denial of Service)

An attack that overloads a server to crash or shut down services.

  • Uses continuous requests from one device
  • Overloads bandwidth
  • Prevents legitimate users from accessing services

8. URL Interpretation Attack

An attack where hackers manipulate URLs to access restricted pages.

  • Guessing URL paths like /admin
  • Attempts to log in to hidden pages
  • Exploits weak access controls

9. Brute Force Attack

An attack where hackers try all possible password combinations to gain access.

  • Uses bots or automated tools
  • Can crack weak passwords quickly
  • Targets login portals and authentication systems

Prevention of Cyber Attacks

Here are some prevention that is helpful to prevent cyber attack.

prevention_of_cyber_attacks

1. Use Strong Passwords

Create complex passwords that are difficult for attackers to guess or crack.

  • Use letters, numbers, and symbols
  • Avoid personal details like birthdays
  • Change passwords regularly

2. Do Not Trust Unknown Emails

Avoid opening suspicious or unexpected emails to prevent phishing and malware.

  • Verify email headers
  • Do not click unknown links
  • Do not download unexpected attachments

3. Secure Your Devices

Protect your systems with security tools to reduce vulnerability.

  • Install antivirus software
  • Enable firewalls
  • Use device passwords or biometrics

4. Regular Updates

Keep all software up to date to fix security weaknesses.

  • Update operating systems
  • Update apps and browsers
  • Apply security patches quickly
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