Malware

(Malicious Software)

Malware

Virus

Spyware

Trojan

Scareware

Worms

Not covered: ransomware, adware, nagware etc

	Spreading Method	Characteristics	Effect	Protection /Clean up Method
Virus	By copying infected files	Able to replicate itself Attach itself to a file .exe, master boot, autorun etc	PC inoperable Delete or corrupt files	Antivirus
Trojan	??	Doesn't replicate itself create backdoor and allows PC to be remotely controlled	use for DDOS attack, use as proxy to send SPAM and concealing attack.	Antivirus
Spyware	??	when installed at PC collect info such as password, collect credit card information	steal valuable information PC will be slow if too many spyware	Antivirus cannot clean spyware

	Spreading Method	Characteristics	Effect	Protection /Clean up Method
Scareware	tricked to installed fake antivirus software	when installed the scareware will inform PC is infected with virus to clean up to pay full licenses	unable to use PC until payment	Antivirus cannot use malware clean up service or google the steps.
Worms	via network (e.g by sending emails)	take advantage on outdated network software such as email server to spread out	consume bandwidth	??

References

https://lifehacker.com/5560443/whats-the-difference-between-viruses-trojans-worms-and-other-malware

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