Type of viruses that add their code to the macros associated with documents , spread sheets and other data files ?

A virus that is located in the memory of a computer, even after the ‘host’ application or program has stopped running (been terminated)?

HINT:

It loads replication module into memory so it does not need to be executed for it to infect other files, activating whenever the operating system loads or operates specific functions. This virus may be one of the worst kinds as it can affect the system thoroughly even attaching itself to anti-virus applications which allows it to infect any file scanned by the program.

a type of virus that destroys the file it infects

and can be removed only by deleting the infected file ?

the main purpose of this virus is to replicate and take action when its executed . when specific condition

is met , this virus will go into action and infects files in the directory ?

is malware that has the capacity to breach web browser security. When it breaches the web browser security, it injects some malicious code to take over the web browser and alter some settings. This type of malware spreads like any other computer virus. It mainly spread with the help of infected web page ads that pop-up in the web page. ?

it is a fast-moving virus that uses file infectors or boot infectors to attack the boot sector and executable files simultaneously. ?

it is a complicated computer virus that affects data types and functions. It is a self-encrypted virus designed to avoid detection by a scanner. ?

a type of virus that can be transmitted via software vulnerabilities. ?

HINT :

it could arrive as attachments in spam emails or instant messages (IMs). Once opened, these files could provide a link to a malicious website or automatically download the malicious virus of this type. Once it’s installed, the virus silently goes to work and infects the machine without the user’s knowledge

a type of malware that is often disguised as legitimate software ?