Computers have made our lives more effortless,
Than ever but computer viruses have been trouble since day one.
The top six most dangerous computer viruses of all time but
here's a list of the most dangerous computer virus let's see
1 - MAIDU
Maidu was one of the worst computer virus outbreaks in history in 2004.
This malware is a worm spread by mass emailing it
broke previous marks set by the so big worm
and i love you to become the fastest spreading email worm ever
email spammers appear to have hired my doom to spread spam by a compromised pcs
users will open an attachment named mail transaction fails
that will sent to the victim
its aim was to take down popular websites
like google and lycos
my doom cost estimated damage of 38 billion dollars in 2004
but its inflation adjusted cost is 52.2 billion us dollars
by that figure my dome has taken on a life of its own
infecting enough poorly protected machines to send 1.2 billion copies of itself per year
16 years after its creation
my doom one of the most widely distributed viruses infected one out of every 12 emails at its height
my doom hit companies like google seo group and,
microsoft with the distributed denial of service attack.
In 2004 16 to 25 percent of all emails had infected by my doom
2 - I LOVE YOU
The i love you virus of 2000 spread by delivering a fake love letter
That appear to be a harmless text file
This attacker like my doom sends copies of itself to all,
the email addresses on the infected machine's contact list
It had spread to over 10 million pcs within a few days after its may 4 release,
Arnold Gusbin a college student from the philippines invented the virus,
He created the wires to collect credentials to log into internet sites,
He wanted to use for free since,
He shot on cash according to reports.
He had no clue how far his work would travel love
letter is another name for this virus
3 - CODE RED
Code red was a computer worm that emerged in July 2001 and,
infected computers running Microsoft's is web server
the code red worm had released on July 13th but,
on July 19 2001 another variant of the worm spread rapidly and
was reported to infect over 250 000 computers in just nine hours
on that day the total number of infected hosts reached 359 thousand
the worm defaced the affected websites
to display the hacked by Chinese text string
it was the first large-scale thread that could successfully target enterprise networks.
In august 2001 the guardian reported that
the FBI had issued serious warnings to
organizations asking them to safeguard themselves against this worm.
4 - CRYPTO LOCKER
The Crypto virus popularly known as Crypto locker is a ransomware virus.
That encrypts files on a computer and demands a ransom in return for a decryption code.
The crypto locker malware spread between early september 2013 and late may 2014.
the primary means of infection was via phishing emails with malicious attachments.
It was identified as a trojan virus,
That targeted computers running different versions of the windows operating system,
Once the crypto locker launched it encrypts many files on,
A user's computer or hard drives servers and,
other storage devices throughout the organization,
Cryptovirus attacks are rising with over 4000 attacks each day
as per the u.s government estimates more than one billion dollars is paid in ransom each year.
5 - MELISSA
The Melissa virus was one of the biggest and earliest cyber threats in history.
Released in march 1999 Melissa started spreading via email,
Infecting thousands of computers within hours.
The virus was sent in a file called list.doc
which contained passwords to censored websites.
So when users downloaded the file and,
opened it in microsoft word a macro inside the document was executed and
emailed the list stock file to 50 people listed in the user's email alias file
email servers at more than 300 companies and
government agencies worldwide became heavy loaded and other had to be close entirely.
as per the U.S FBI report the estimated cost for cleaning and
repairing affected computer systems was 18 million dollars.
6 – Slammer
On saturday january 25th 2003.
The internet hit by a vicious computer worm known as sql slammer.
It brought down most of the world's sql servers and
slowed down internet traffic.
bank atms were down
Slammer was 376 bytes of malicious code that attempted to connect to every computer
it could find over ms sql udp port 1434.
Causing heavy network traffic it
believed to have infected over 75 000 systems within 10 minutes,
Sql slammer was the fastest spreading computer worm in history
The new york times reported
that microsoft admitted that some of its
machines had gone unpatched and that its msn internet service also
had significant slowdowns due to the slammer worm.