Newsletter # 20
Unfortunately, we are seeing new viruses that plague us no end. Hopefully, this will find
your computers up and running.
Ms. Boots
'Melissa' macro worms around Web E-mail Word attachment called list.doc
contains virus/worm that sends copies of itself around Net By Bob
Sullivan
MSNBC March 27-
If you receive an e-mail with the subject line
"Important message from ... ," be suspicious. If that message comes with
a Word document attached called "list.doc," you've likely been sent the
Word/Melissa macro virus. And if you open the document, it will send 50
copies of itself to several e-mail addresses it gleans from your
personal e-mail.
That gives it the ability to propagate very quickly -
much quicker than the happy99.exe worm, according to virus experts.
IF YOU'VE BEEN infected, don't feel bad - experts think hundreds of
thousands of PCs might have been infected in the two days the virus has
been "in the wild."
The document itself contains a list of 73 pornographic Web sites, along
with usernames and passwords for those sites. The virus may have been
unleashed on the world Friday - it contains the text "Password List for
March 26, 1999."
The virus can allow documents to be e-mailed to other people without
warning, a potential security breach that should worry businesses and
governments, an expert at Carnegie Mellon University said Saturday.
"Melissa" spreads via infected e-mail and attacks computers loaded with
Microsoft's widely used Word 97 or Word 2000 programs, according to
CERT - or Computer Emergency Response Team - Carnegie Mellon's
Department of Defense-funded computer security team.
CERT first heard of the virus Friday afternoon and its members worked
through the night to analyze the virus and develop a fix, CERT manager
Katherine Fithen said.
"We're getting so many reports from across the world., that we know this
is going to be a huge problem come Monday," Fithen said.
She noted that since CERT was founded 10 years ago, this is only the
second time it has considered a virus important enough to warrant a
public announcement. The first, in 1994, warned of a virus that allowed
computer burglars to collect passwords.
SPREADING RAPIDLY
CERT has not determined where the Melissa virus originated.
Fithen said she is not allowed to say whether any governmental agency
has suffered a security breach as the result of Melissa.
Friday, a spokesman from Network Associates said the company received
one e-mail every three minutes starting at 8 a.m. from clients
complaining about the file.
"It's spreading much faster than happy99," he said.
About 60,000 users were infected at the company which made the first
complaint, said Srivhes Sampath, general manager of McAfee Online. "It
pretty much brings mail systems to a halt ... We've never seen anything
spread like this."
The Melissa macro is spreading so fast for two reasons; it sends 50
copies of itself out after it infects a user; and, it is often able to
fool potential victims into thinking the mail came from a trusted
source.
After infecting a user, the macro reads the victim's registry and gleans
the user's name. It then sends 50 copies of itself to e-mail addresses
included in that user's address book. The subject line of those mails
includes the infected user's name (it reads "Important message from
[user name]"), which often tricks potential victims into trusting the
message and opening the attached document, according to Network
Associates.
The user does not know he or she is infected until an e-mail recipient
complains.
"Word/Melissa written by Kwyjibo," is the text that accompanies the
macro. The author also pokes fun at virus writers who he or she expects
will argue about the exact classification of the pest, as often happens.
"Works in both Word 2000 and Word 97. Worm? Macro Virus? Word 97 Virus?
Word 2000 Virus? You Decide!"
Kwyjibo appears to be a reference to a "Simpson's" TV show episode in
which Bart Simpson wins a Scrabble game by spelling out the word
Kwyjibo. The virus also includes a line from that episode: "Twenty-two
points, plus triple-word-score, plus fifty points for using all my
letters. Game's over. I'm outta here."
The Associated Press contributed to this report.
**********************************************************************
W97M/Melissa
Melissa is a Word 97 Class Module Macro virus that can also be
upconverted to a Word 2000 Macro Virus. It was first discovered by NAI's
Dr Solomon's VirusPatrol today on the alt.sex newgroup. The virus has
spread rapidly around the world, and has infected thousands
Symptom
The virus can infect a system by being received from another infected
user via Outlook. This appears to be the most common method of
infection. Users will not know they have been infected, nor will the
sender know the document has been sent. A user may become alerted to the
infected document if the Macro Security settings are enabled. This
warning will be displayed to the user when the document is opened.
Pathology
When the infected document is opened, the virus checks for a setting in
the registry to test if the system has already been infected.
If the system hasn't been infected, the virus creates an entry in the
registry: HKEY_CURRENT_USER\Software\Microsoft\Office\"Melissa?" = "...
by Kwyjibo"
(If this key exists the email process will not execute, the virus will
still infect. AVERT advises that it not be removed.)
(As a preventive message you can create this registry key to prevent the
virus from launching)
This virus also creates an Outlook object using Visual Basic
instructions and reads the list of members from Outlook Global Address
Book. An email message is created and sent to the first 50 recipients
programmatically all the address books, one at a time. The message is
created with the subject
"Important Message From - <User Name>"
The message body of text reads
"Here is that document you asked for ... don't show anyone else ;-)".
The active infected document is attached and the email is sent. The most
prevalent document being seen is one called List.DOC, however this is
NOT the only document that can be sent or received. Once the system is
infected all documents that are opened are infected. As any document can
be sent, a user that receives the infected document, who hasn't been
infected, can become infected with this document, and the process will
continue.
The virus does have a payload. If the day equals the minute value, and
the infected document is opened this text is inserted at the current
cursor position:
" Twenty-two points, plus triple-word-score, plus fifty points for using
all my letters. Game's over. I'm outta here."
This virus checks for low security in Office2000 by checking the value
from the registry; if the value
HKEY_CURRENT_USER\Software\Microsoft\Office\9.0\Word\Security\"Level" is
not null,
the virus will disable the "MACRO/SECURITY" menu option. Otherwise
Word97 menu option "TOOLS/MACRO" is disabled.
Comments inside the macro virus include:
'WORD/Melissa written by Kwyjibo
'Works in both Word 2000 and Word 97
'Worm? Macro Virus? Word 97 Virus? Word 2000 Virus? You Decide!
'Word -> Email | Word 97 <--> Word 2000 ... it's a new age!
In other words, here we go again folks.. Suffice to say that if you
receive such document, DON'T!! open it.. It was launched to the best of
my knowledge around the 26th of March. Hope this gives you a bit more
warning than the Happy99exe. Issue.
Compiled by Mig in hopes of safe computing for all
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