These attacks deliberately make machines and network resources unavailable for the assigned users. Attacks take various techniques used in these kinds of attacks. The most common of these techniques include user credentials and login compromization and overloading and stressing computing power or network resources to block access to all users.

These are harmful software that are deployed by hackers into systems to cause all kinds of problems. Malwares are designed for various executions including damaging and deleting important files, taking over systems, secretly monitoring and reporting activities, discreetly sending confidential files to hackers. Hackers deploy malware in a variety of ways to victims.

Hackers attempt to lure system users into giving away sensitive information such as usernames and passwords. The hackers then use the sensitive information to access systems, steal information, deploy malware, and attack other systems to wreak all kinds of havoc. Spam and phishing emails or calls are common ways cybercriminals prank users into giving away sensitive information.

These attacks involve hackers inserting themselves into the communication between a trusted network server and a client PC. The hacker poses as one of the parties and continues with the dialogue to steal sensitive information. These sophisticated attacks can occur during normal web browsing and secured access sessions.

Hackers use mechanical or software systems to listen to network traffic to intercept sensitive information. The attacker listens to pick up sensitive information such as passwords, usernames, credit card numbers, and confidential information being sent over the network. Sophisticated attacks include hackers listening without interfering with systems or posing as a client system.

This is an attack in which the attacker uses third-party web resources to assault a target. The attacker injects malicious code into the database of vulnerable websites. The scripts are sent to the victim's browser when they access the website. Browsers run these scripts automatically and act. The actions steal cookie information, which is used to exploit further vulnerabilities.

This attack is targeted at database-driven websites. Attackers exploit vulnerabilities in SQL databases by running queries to the database through the input section on the website to the server. When successful, hackers get access to sensitive data from the database, modify data, execute administrative operations, access the content of files, and even issue commands to the operating system.