CYBER ATTACKS AND ITS SECURITY.......
Cyber Security Introduction - Cyber Security Basics:-
Cyber security is the most concerned matter as cyber threats and attacks are overgrowing.
Attackers are now using more sophisticated techniques to target the systems. Individuals,
small-scale businesses or large organization, are all being impacted. So, all these firms
whether IT or non-IT firms have understood the importance of Cyber Security and focusing
on adopting all possible measures to deal with cyber threats.
What is cyber security?
"Cyber security is primarily about people, processes, and technologies working together to
encompass the full range of threat reduction, vulnerability reduction, deterrence, international
engagement, incident response, resiliency, and recovery policies and activities, including
computer network operations, information assurance, law enforcement, etc."
OR
Cyber security is the body of technologies, processes, and practices designed to protect
networks, computers, programs and data from attack, damage or unauthorized access.
- The term cyber security refers to techniques and practices designed to protect digital
data.
- The data that is stored, transmitted or used on an information system.
Cyber security is the protection of Internet-connected systems, including hardware, software,
and data from cyber attacks. It is made up of two words one is CYBER and other is SECURITY.
- Cyber is related to the technology which contains systems, network and programs or
data.
- Whereas security related to the protection which includes systems security, network
security and application and information security.
Why is cyber security important?
Listed below are the reasons why cyber security is so important in what’s become a
predominant digital world:
Cyber attacks can be extremely expensive for businesses to endure.
In addition to financial damage suffered by the business, a data breach can also inflict
untold reputational damage.
Cyber-attacks these days are becoming progressively destructive. Cybercriminals are
using more sophisticated ways to initiate cyber attacks.
Regulations such as GDPR are forcing organizations into taking better care of the
personal data they hold.
Because of the above reasons, cyber security has become an important part of the
business and the focus now is on developing appropriate response plans that minimize
the damage in the event of a cyber attack.
But, an organization or an individual can develop a proper response plan only when
he has a good grip on cyber security fundamentals.
Types of Cyber Attacks
A cyber-attack is an exploitation of computer systems and networks. It uses malicious code to
alter computer code, logic or data and lead to cybercrimes, such as information and identity
theft.
Cyber-attacks can be classified into the following categories:
1) Web-based attacks
2) System-based attacks
Web-based attacks
These are the attacks which occur on a website or web applications. Some of the important
web-based attacks are as follows
1. Injection attacks
It is the attack in which some data will be injected into a web application to manipulate the
application and fetch the required information.
Example- SQL Injection, code Injection, log Injection, XML Injection etc.
2. DNS Spoofing
DNS Spoofing is a type of computer security hacking. Whereby a data is introduced into a
DNS resolver's cache causing the name server to return an incorrect IP address, diverting
traffic to the attackers computer or any other computer. The DNS spoofing attacks can go on
for a long period of time without being detected and can cause serious security issues.
3. Session Hijacking
It is a security attack on a user session over a protected network. Web applications create
cookies to store the state and user sessions. By stealing the cookies, an attacker can have
access to all of the user data.
4. Phishing
Phishing is a type of attack which attempts to steal sensitive information like user login
credentials and credit card number. It occurs when an attacker is masquerading as a
trustworthy entity in electronic communication.
5. Brute force
It is a type of attack which uses a trial and error method. This attack generates a large number
of guesses and validates them to obtain actual data like user password and personal
identification number. This attack may be used by criminals to crack encrypted data, or by
security, analysts to test an organization's network security.
6. Denial of Service
It is an attack which meant to make a server or network resource unavailable to the users. It
accomplishes this by flooding the target with traffic or sending it information that triggers a
crash. It uses the single system and single internet connection to attack a server. It can be
classified into the following
- Volume-based attacks- Its goal is to saturate the bandwidth of the attacked site, and is
measured in bit per second
- Protocol attacks- It consumes actual server resources, and is measured in a packet.
- Application layer attacks- Its goal is to crash the web server and is measured in request per
second. \
7. Dictionary attacks
This type of attack stored the list of a commonly used password and validated them to get
original password. \
8. URL Interpretation
It is a type of attack where we can change the certain parts of a URL, and one can make a
web server to deliver web pages for which he is not authorized to browse.\
9. File Inclusion attacks
It is a type of attack that allows an attacker to access unauthorized or essential files which is
available on the web server or to execute malicious files on the web server by making use of
the include functionality.
10. Man in the middle attacks
It is a type of attack that allows an attacker to intercepts the connection between client and
server and acts as a bridge between them. Due to this, an attacker will be able to read, insert
and modify the data in the intercepted connection.
System-based attacks
These are the attacks which are intended to compromise a computer or a computer network.
Some of the important system-based attacks are as follows
1. Virus
It is a type of malicious software program that spread throughout the computer files without
the knowledge of a user. It is a self-replicating malicious computer program that replicates by
inserting copies of itself into other computer programs when executed. It can also execute
instructions that cause harm to the system.
2. Worm
It is a type of malware whose primary function is to replicate itself to spread to uninfected
computers. It works same as the computer virus. Worms often originate from email
attachments that appear to be from trusted senders.
3. Trojan horse
It is a malicious program that occurs unexpected changes to computer setting and unusual
activity, even when the computer should be idle. It misleads the user of its true intent. It
appears to be a normal application but when opened/executed some malicious code will run
in the background.
4. Backdoors
It is a method that bypasses the normal authentication process. A developer may create a
backdoor so that an application or operating system can be accessed for troubleshooting or
other purposes.
5. Bots
A bot (short for "robot") is an automated process that interacts with other network services.
Some bots program run automatically, while others only execute commands when they
receive specific input. Common examples of bots program are the crawler, chatroom bots,
and malicious bots
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