PC Security:
Computer Viruses that Come a
Callin’
by Ainuddin Mohamad
Every day new
computer viruses are created to annoy us and to wreck havoc on
our computer systems. Below are ten viruses currently cited as
being the most prevalent in terms of being seen the most or in
their ability to potentially cause damage. New viruses are
created daily. This is by no means an all inclusive list. The
best thing you can do is to remain vigilant, keep your
anti-virus software updated, and stay aware of the current
computer virus threats.
Virus: Trojan.Lodear
A Trojan horse that attempts to
download remote files. It will inject a .dll file into the
EXPLORER.EXE process causing system instability.
Virus: W32.Beagle.CO@mm
A mass-mailing worm that lowers
security settings. It can delete security-related registry
sub keys and may block access to security-related websites.
Virus:
Backdoor.Zagaban
A Trojan
horse that allows the compromised computer to be used as a
covert proxy and which may degrade network performance.
Virus: W32/Netsky-P
A mass-mailing worm which
spreads by emailing itself to addresses produced from files on
the local drives.
Virus: W32/Mytob-GH
A mass-mailing worm and IRC
backdoor Trojan for the Windows platform. Messages sent by
this worm will have the subject chosen randomly from a list
including titles such as: Notice of account limitation, Email
Account Suspension, Security measures, Members Support,
Important Notification.
Virus: W32/Mytob-EX
A mass-mailing worm and IRC
backdoor Trojan similar in nature to W32-Mytob-GH. W32/Mytob-EX
runs continuously in the background, providing a backdoor
server which allows a remote intruder to gain access and
control over the computer via IRC channels. This virus
spreads by sending itself to email attachments harvested from
your email addresses.
Virus:
W32/Mytob-AS, Mytob-BE, Mytob-C, and Mytob-ER
This family of worm variations
possesses similar characteristics in terms of what they
can do. They are mass-mailing worms with backdoor
functionality that can be controlled through the Internet
Relay Chat (IRC) network. Additionally, they can spread
through email and through various operating system
vulnerabilities such as the LSASS (MS04-011).
Virus: Zafi-D
A mass mailing worm and a peer-to-peer worm which
copies itself to the Windows system folder with the filename
Norton Update.exe. It can then create a number of files in
the Windows system folder with filenames consisting of 8
random characters and a DLL extension. W32/Zafi-D copies
itself to folders with names containing share, upload, or
music as ICQ 2005a new!.exe or winamp 5.7 new!.exe. W32/Zafi-D
will also display a fake error message box with the caption
"CRC: 04F6Bh" and the text "Error in packed file!".
Virus: W32/Netsky-D
A mass-mailing worm with IRC backdoor functionality
which can also infect computers vulnerable to the LSASS
(MS04-011) exploit.
Virus:
W32/Zafi-B
A
peer-to-peer (P2P) and email worm that will copy itself to the
Windows system folder as a randomly named EXE file. This worm
will test for the presence of an internet connection by
attempting to connect to www.google.com or www.microsoft.com.
A bilingual, worm with an attached Hungarian political text
message box which translates to “We demand that the government
accommodates the homeless, tightens up the penal code and
VOTES FOR THE DEATH PENALTY to cut down the increasing crime.
Jun. 2004, Pécs (SNAF Team)”
About the Author
Ainuddin Mohamad is the Webmaster of
http://www.BestWebsites.com.my which is a Directory of Best Websites. Since
July 2000
BestWebsites.com.my has featured thousands of best websites in many
categories of interest with descriptions/reviews given by leading publications
and webmasters.
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