Security

Question 1

What are the five categories of security violations?

Answer 1

Breach of confidentiality
Unauthorised reading of data
Breach of integrity
Unauthorised modification of data
Breach of availability
Unauthorised destruction of data
Theft of service
Unauthorised use of resources
Denial Of Service (DoS not MS-DOS!)
Prevention of legitimate use 
Overload the targeted computer preventing it from doing any useful workMasquerading 
breach authentication
By pretending to be an authorised user to escalate privileges

Question 2

What are the different types of malware?

Answer 2

Viruses, Trojans, Rootkits, Worms, Spyware, Crimeware and adware

Question 3

What are the types of viruses

Answer 3

Types of virus
Non-resident viruses
Disappear from a memory after system infected

Resident viruses
Remain in a memory after system infected
Temporary resident

Boot sector viruses
Remain in theMaster Boot Record(MBR) on a hard disk!!
Permanent resident (or a citizen)

Question 4

What is a worm?

Answer 4

a standalonemalwarethat replicates itself in order to spread to other computers

Unlike acomputer virus,
it does not need to attach itself to an existing program

Drops a malicious payload and a backdoor!

Can cause some harm to the network, even if only by consuming bandwidth

Question 5

What is a trojan

Answer 5

Trojan
is a non-self-replicating type ofmalware

Drops a malicious payload and a backdoor!
allowing unauthorised access to the target’s computer

Question 6

What is ransomware

Answer 6

Ransomware: A type of Trojan/Worm
Prevents or limits users from accessing their system, either by locking the system’s screen or by locking/encrypting the users’ files unless a ransom is paid
One of the fastest growing malware in 2016 (PandaLabs report 2017)

Question 7

What is spyware?

Answer 7

Gather information on the system (without user’s permission)
And then, send such information to another person

Interferes with networking software
causes difficulty connecting to the Internet

Unlikevirusesandworms,
It does not usually self-replicate

Question 8

What is adware?

Answer 8

Adware is a spyware especially designed for advertising purpose

Question 9

What is crimeware?

Answer 9

isdesigned specifically to automatecybercrime

perpetrateidentity theft
in order to access a computer user’s online accounts

at financial services companies and online retailers

Question 10

What is a rootkit?

Answer 10

Hide itself from normal methods of detection

Try to obtain root or Administrator access