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From: "Scott Migaldi" <smigaldi@ho*.co*>
To: cavers@cavers.com
Subject: Virus from Skip MacElhannon
Date: Wed, 10 Feb 1999 12:22:28 PST
Here is the visus alret from MacAfee.

Carl is skip another candidate for the dumpster???

Scott
------
AVERT - A Division of NAI Labs
Virus Name: W32/Ska (a.k.a. Happy99.exe)

This page last updated 2/1/99


W32/Ska is a worm that was first posted to several newsgroups and has 
been reported to several of the AVERT
Labs locations worldwide. When this worm is run it displays a message 
"Happy New Year 1999!!" and displays
"fireworks" graphics. The posting on the newsgroups has lead to its 
propagation. It can also spread on its own, as it
can attached itself to a mail message and be sent unknowingly by a user. 
Because of this attribute it is also considered to be a worm.

AVERT cautions all users who may receive the attachment via email to 
simply delete the mail and the attachment. 

The worm infects a system via email delivery and arrives as an 
attachment called Happy99.EXE. It is sent
unknowingly by a user. When the program is run it deploys its payload 
displaying fireworks on the users monitor. 

Note: At this time no destructive payload has been discovered.

When the Happy.EXE is run it copies itself to Windows\System folder 
under the name SKA.EXE. It then extracts,
from within itself, a DLL called SKA.DLL into the Windows\System folder 
if one does not already exist. 

Note: Though the SKA.EXE file file is a copy of the original it does not 
run as the Happy.EXE files does, so it does
not copy itself again, nor does it display the fireworks on the users 
monitor.

The worm then checks for the existence of WSOCK32.SKA in the 
Windows\System folder, if it does not exist and a
the file WSOCK32.DLL does exist, it copies the WSOCK32.DLL to 
WSOCK32.SKA.

The worm then creates the registry entry -

              
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Ska.exe="Sk
a.exe" 

- which will execute SKA.EXE the next time the system is restarted. When 
this happens the worm patches
WSOCK32.DLL and adds hooks to the exported functions EnumProtocolsW and 
WSAAsyncGetProtocolByName. 

The patched code calls two exported functions in SKA.DLL called mail and 
news, these functions allow the worm to
attach itself to SMTP e-mail and also to any postings to newsgroups the 
user makes.
--
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