Cyber attacks exploit vulnerabilities in systems, networks, and human behavior to steal data, disrupt operations, or cause harm. Understanding major types helps organizations prioritize defenses like firewalls, training, and patching.
Denial-of-Service (DoS) and DDoS Attacks
These overwhelm targets with traffic, making services unavailable. DoS uses one source; DDoS leverages botnets for massive scale, often hitting websites or servers during peak times.
Phishing and Social Engineering
Attackers trick users via emails, calls, or sites mimicking trusted entities to reveal credentials or click malware links. Spear-phishing targets individuals; whaling aims at executives.
Malware
Malicious software including viruses (self-replicating), worms (network-spreading), trojans (disguised payloads), ransomware (data encryption for ransom), and spyware (data theft). Delivered via downloads or email attachments.
Man-in-the-Middle (MITM)
Intercepting communication between parties to eavesdrop or alter data, common on unsecured Wi-Fi. Tools like packet sniffers enable credential theft or session hijacking.
SQL Injection
Hackers insert malicious code into web app input fields to manipulate databases, extracting sensitive info like user records. Poor input validation enables this.
Password and Credential Attacks
Brute force (trial-and-error guessing), dictionary attacks (common words), or credential stuffing (reusing stolen logins). Weak/reused passwords amplify risks.
Zero-Day Exploits
Attacks on undisclosed software flaws before patches exist. Advanced groups weaponize these for espionage or ransomware.
Supply Chain Attacks
Compromising trusted vendors to infiltrate customers, like SolarWinds where malware hid in software updates.
| Type | Goal | Common Vector | Prevention |
|---|---|---|---|
| DDoS | Disruption | Botnets | Traffic filtering |
| Phishing | Access | Email links | User training |
| Ransomware | Extortion | Attachments | Backups/antivirus |
| MITM | Interception | Public Wi-Fi | VPN/encryption |
| SQL Injection | Data theft | Web forms | Sanitized inputs |
| Zero-Day | Persistence | Unpatched apps | Zero-trust |
Regular updates, multi-factor authentication, and awareness training mitigate most threats effectively.
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