In History

10 Worst Computer Virus

Damage - $500 million

Sasser

Year 2004

- Written by Sven Jaschan  - 17 years old German student - Arrested at age of 18 in 2004 - $250,000 bounty was posted for the creator of this virus - Jaschan was released from the sentence as he was a minor at the time he wrote the malware

Damage - $665 million

Crypto Locker

Year 2013

- Attacked more than 250,000 machines and encrypted the files. - Impacted more than 5,000 companies - average recovery cost of one business entity was ~ $133,000

-“your important files encryption produced on this computer.”

 - Ransom Note -

Damage - $1.2  billion

Slammer

Year 2003

- Impacted 200,000 computers - SQL Slammer cased DDoS attack on several internet hosts - The slammer hits many banks in U.S. and Canada and causes many ATMs down. - Customers of Toronto's Imperial Bank of Commerce was not able to access funds for many days

Damage - $2.4  billion

Code RED

Year 2001

- This worm penetrated 975,000  computers - Ran from computer memory, with no trace on a hard disk or other storage - Attacked U.S. White House's website www.whitehouse.gov - White House had to change its IP address to defend against Code Red.

Damage - $3  billion

Zeus

Year 2007

- Zeus virus was an online theft tool - Was responsible for 44% of all banking malware attacks, 88% breaches of all Fortune 500 companies, 2,500 organizations, and 76,000 computers across 196 countries - Started with multiple botnets, originating from Eastern Europe to transferring money in secret accounts. - More than 100 members of this virus group were arrested in 2010, mostly from US.

Damage - $4  billion

WannaCry

Year 2017

- Ransomware that bleeds the world - Spread across 150 countries, caused massive production losses - Who didn't pay the ransom were forced to rebuild systems from scratch - This malware spread like wildfire and in no time, impacted more than 200,000 computers worldwide. - 22 year security researcher in UK found the way to turn it off.

Damage - $15  billion

ILOVEYOU

Year 2000

- Infected 10 million PCs across the world - Sending bogus "Love Letter" as a text file - Philippines student Onel de Guzman created this virus to steal password to access online services for free

Damage - $20  billion

Klez

Year 2001

- Infected more than 7 million PCs across the world - Sending fake emails from spoofed senders and deactivating other viruses. - Developer of this virus is still unknown.

Damage - $30  billion

Sobig

Year 2003

- Infected more than 10 million PCs across the world - Spread by email attachment. - Disturbed Air Canada and impacted countless companies across the globe. - The developer of this virus was never caught.

Damage - $38  billion

Mydoom

Year 2004

- Spread by mass emailing - at one time 25% of all emails across the globe were sending Mydoom Virus - This virus was causing DDoS attacks and was resulting in the shutdown of the website - Reward of $250,000 was offered to catch the creator - The creator of the virus was never caught