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Bagle was detected in 2004, it infected users through an email attachment, and also used email to spread itself. Bagle did not rely on the MS Outlook contact list to make a list of where to send itself. It harvested email addresses from various document files stored in the infected computer – from plain-text files to MS Excel files. The danger of this virus was that its design opened a backdoor where a remote user could gain access and control of the infected computer. It could download additional components to either spy and steal information from the user or launch DDoS attacks to certain networks and computers.
2. Melissa
Melissa virus was made in 1999 by David L. Smith, created with Basic program, exactly with Microsoft Word macros. The Melissa virus was mass-mailing malware that was said to have infected up to 20 percent of computers worldwide. This virus spreads via email with the document “Here is That document you asked for, do not show it to anybodey else”. When this file will be opened or clicked it will automatically run the virus replication and automatically send a pass up to the top 50 in the address book of an email. Email servers around the world were forced to shut down in order to prevent the virus from spreading, as well as to remove the virus from their system.Smith was jailed 20 months and fined $ 5,000 and prohibited from accessing the computer without supervision.
3. Sasser
Creator by 17 year old German student, Sven Jaschan in 2004. Sasser attack Microsoft Windows. Sasser does not spread via email. The virus is usually spread through the network. It infected computers by exploiting vulnerability present in both Windows 2000 and Windows XP machines, known as the RPC (Remote Procedure Call) exploit. This will create a computer virus could not be shutdown without unplug the power. Jaschan Finally caught but he’s not jail, was only given probation 1 year 9 months, because at that time still under the age of 18.
4. ILOVEYOU a.k.a. Lovebug/Loveletter Virus
This virus started spreading in the Philippines, these virus classified as worm, which has the ability to do her own replication. Creator Onel de Guzman was from the Philippines. ILOVEYOU spread via email, with the title “love letters” from a secret admirer. Once opened, it loaded itself to the memory, infecting executable files. When a user received and opened the email containing the attachment “LOVE-LETTER-FOR-YOU.txt.vbs”, the computer became automatically infected. It then spread itself by infecting *.exe,*.jpg,*.mp3 files. After that, the virus sent itself to others by looking up the addresses contained in the MS Outlook contact list. The virus was written by a Filipino programmer who was still a college student at that time. He said the release of the virus was only “accidental.” This virus spread throughout the world in just a day, infecting computers of large corporations and governments, including the Pentagon in the United States. It caused billions of dollars in damages. The actual “damage” occurred during the removal of the infection from computers, as email servers and computer networks had to be shut down before the virus could be removed.His original file LOVE-LETTER-FOR-YOU.TXT. vbs.
5. MyDome
MyDome virus was detected in 2004. This virus is making a backdoor on the OS. Computer was first known attack on first February by doing DDoS. Then reported back to attack on the 12th of Feb, after that the virus stopped spreading and start creating backdoors. MyDoom spreads via email. MyDoom slowed down global Internet access by ten percent, and caused some website access to be reduced by 50%.
6. Leap-A/Oompa- A
Mac that has a concept of security through obscurity, Mac believe thea system can’t be infected by a virus of cause of the OS system is a closed. But in the year 2006, Leap-A virus or commonly known as Oompa-A appears and spreads via iChat on the Mac. Having a Mac attack, the virus will search for contacts via iChat and send messages to each contact. The message will contain a form of corrupt JPEG file. It’s not dangerous, but this proved that the Mac OS systems are not immune to the virus.
7. SQL Slammer
Appeared in January in the year 2003, spread quickly via the Internet. It caused a considerable amount of damage, though, by overwhelming routers, causing them to shut down. The target of this virus was web servers running a vulnerable version of Microsoft SQL Server. Upon infection of a server, the virus generated random IP addresses through which it attempted to further infect other computers.This virus has also been a U.S. Bank ATMs crash, the collapse of Seattle’s 911 service, and Continental Airlines.
8. Nimda
Reported attacks in 2001, call Nimda taken from opposite the word “Admin”. With its multi-pronged attack, Nimda appears to be the most troublesome virus of its type that has yet appeared. Its name (backwards for "admin") apparently refers to an "admin.DLL" file that, when run, continues to propagate the virus.These viruses spread very quickly, according to TruSecure CTO Peter Tippett, Nimda only takes 22 minutes to make the Top Ten Virus at the time. The main target of this virus is Internet servers, Nimda spread through Internet network by creating a backdoor into the OS.
9. Code Red
The world had not yet recovered from the damage caused by the ILOVEYOU virus when Code Red was released in simmer 2001.Code red virus attacks only Windows 2000 & NT OS. This virus will create a buffer becomes full so make the memory becomes full. Once a computer was compromised by the virus, it would modify the handled website, displaying the message “Welcome to http://www.worm.com! Hacked by Chinese!” Then, it would later seek other computers running the web server software and do the same thing. After about two weeks of infection, the virus was programmed to launch DDoS (Distributed Denial of Service) attacks on certain websites, including the server of the White House.
10. The Klez
This virus was first known infected on 2001, this virus spreads via email by conducting continuous replication, and sent to all email addresses in the victim’s address book. This virus makes the victim computer becomes very slow and can also turn off the antivirus application.
1. Sadmind worm (2001) ALIAS: Sadmind/IIS, Unix/Sadmind, Solaris/Sadmind.worm
The Sadmind worm was a self-propagating piece of malware, It was first discovered on May 8, 2001 in china. Sadmind is designed to provide remote system administration operations and is installed by default with many versions of the Sun Microsystems operating system. It affected some big operating systems like Sun Microsystems Solaris(OS) and Microsoft's Internet Information Services (IIS) which is the world's second most popular web server in terms of overall websites behind the industry leader Apache HTTP Server.
2. Beast Trojan (2002) Beast is a Windows-based backdoor trojan horse more commonly known in the underground cracker community as a RAT (Remote Administration Tool). It was created in Delphi and released first by its author Tataye in 2002. Beast was one of the first trojans to feature a 'reverse connection' to its victims and once established, it gave the attacker complete control over the infected computer.
Once connected to the victim computer, via Beast hacker can access victim's all computer file and directories along with the power to upload, download, delete or execute any file or folder.
3. SQL Slammer (2003) ALIAS: Sapphire, Worm.SQL.Helkern, SQLSlammer
Appeared first in 27th January 2003 and soon got a high rank in the list of most dangerous worms of the year because it is the first fileless worm. Slammer was able to spread by taking advantage of the vulnerability found in the SQL Server.
Slammer spread to over 90 percent of all vulnerable hosts in 10 minutes and infected around 359,000 computers total and according to London-based market intelligence the worm caused between $950 million and $1.2 billion in lost productivity in its first five days worldwide.
4. Sasser (2004) Sasser is an Internet worm that probably caused around $18.1 billions of dollars of damage in 2004. It was created by a Computer science student, Sven Jaschan in Germany first seen on last day of april. While there was no intentionally destructive payload, Sasser did cause many computers to slow down or crash, causing some high profile damage.
And was destructive enough to shut down the satellite communications for some French news agencies. It also resulted in the cancellation of several Delta airline flights and the shutdown of numerous companies’ systems worldwide.
5. Bandook (2005) ALIAS: Bandook Rat
Bandook Rat is a backdoor trojan horse that infects Windows NT family systems (Windows 2000, XP, 2003, Vista). It uses a server creator, a client and a server to take control over the remote computer. It uses process hijacking / Kernel Patching to bypass the firewall, and allow the server component to hijack processes and gain rights for accessing the internet. It is somehow very similar to Beast Trojan (2002)
Nyxem worm was first found on March, 2006. The worm spreads in e-mails using an external SMTP engine. It sends itself with different subjects, body text and attachment names. The worm also copies itself multiple times to an infected hard drive. Blackworm is designed to corrupt data on infected computers on February 3, 2006, in respect to The Day the Music Died.
The most scary thing in this worm is, It can deletes your antivirus programs, if they are installed in the same directories as the ones specified in the worm's code. It can also delete the entries in the Windows Registry belonging to these antivirus programs, so these applications will not be run automatically the next time Windows is started.
The worm also contains one GIF file which is used to make a recipient of infected e-mails think that the message was scanned by Norton Anti-Virus and no infection was found.
But its havoc ended soon and it gone off the records after October 26.
7. Storm Worm (2007)
ALIAS: Small.dam, Trojan.Peacomm, Trojan.Peed, Trojan.Tibs, W32/ZhelatinBut soon after the Nyxem ended, a new virus has been discovered on January 17, 2007 named Storm Worm having the same functionality as Nyxem, It hides himself in a email attachments that had the following title line: "230 dead as storm batters Europe."Users that opened the attachment let the virus come in their machines. This virus infected around 10 million computers worldwide and after the computer is infected it could be used to launch millions of spam emails that would advertise Web links.
But it has also got some new features of stealing identity and according to the United States Federal Bureau of Investigation the Storm highly helped hackers in bank fraud, identity theft, and a number of other cybercrimes.
8. Conficker (2008)
ALIAS: Downup, Downadup, Kido
Conficker is a computer worm targeting the Microsoft Windows operating system that was first detected 20th November 2008 affected more than seven million government, business and home computers in over 200 countries.
60 Minutes - The Internet is Infected (March 29, 2009)The worm attacks the Microsoft vulnerability MS08-067 in Server Service which allows remote code execution. This vulnerability allows a remote attacker to run arbitrary code on the machine without authentication and take full control of the computer. Second, Conficker Worm uses the infected machine computing power to execute password brute force attacks to crack administrator passwords in the local network. This will allow the worm to spread through network shares as well.
The worm is said to have caused 9.1 billion in damage, mostly in Asia, South America and Europe.
New versions of Conficker came with the power to
-Blocks DNS lookups.
-Disables AutoUpdate.
-Kills anti-malware.
-Scans for and terminates processes with names of anti-malware, patch or diagnostic utilities at one-second intervals.
Microsoft sets a bounty of $250,000 USD for information leading to the capture of the worm's author(s).
9. Daprosy Worm (2009)
Daprosy was first observed in early May 2009 and first announced to public as Daprosy trojan worm by Symantec on July 2009 . This worm is a malicious computer program that spreads via LAN connections, spammed e-mails and USB mass storage devices. Infection comes from a single read1st.exe filewhere several dozens of clones are created at once bearing the names of compromised folders. The most obvious symptom of Daprosy infection is the presence of Classified.exe or Do not open - secrets!.exe files from infected folders.
The worm is known to destabilize, corrupt and even stall the operating system due to programming bugs. It appears that it is incomplete and was probably created by students or amateur Visual Basic programmers. As of October 2009 special scripts are available to remove it from infected computers but till then many Windows system were stalled.
10. Alureon (2010)
Alureon is a trojan and rootkit which is designed to steal data by intercepting a system's network traffic and searching it for usernames, passwords and credit card data. Microsoft has confirmed that Alureon is the cause of a series of BSoD problems on Windows systems which were triggered by Patch Tuesday update MS10-015. Microsoft will not install the patch on these systems. The Alureon rootkit was first seen in 2006 and now started affecting computers.
PCs become infected by downloading software also particularly off torrent sites and visiting certain posting sites.
Other viruses that appeared during this period of time include:
2001: Anna Kournikova virus, Sircam, Code Red worm, Code Red II, Nimda, Klez
