On activation the worm displays a Christmas-related picture and
plays a tune as a disguise. Its activation effect usually looks
The messages sent by Music worm have the following subjects and
Subject: Testing to send file
Text: Hi, just testing email using Merry Christmas music file, not bad music.
Text: Hi, just testing email using Merry Christmas music file, you'll like it.
The worm has three components: Dropper, Sender and WinSock
1. The first worm's component (Dropper) is sent attached to
emails. When it is run, it copies itself to Windows system
directory with SYSMCM.EXE name and registers this file in
auto-run registry key, then plays a tune and displays pictures to
This worm's component doesn't send any messages. To spread
further the worm connects two Inet sites and gets the rest of its
components from there, copies them to Windows directory with the
names: SYSDRV.EXE and SYSTMP.DLL
2. Second worm component (Sender), is downloaded from an Internet
website and copied to Windows System directory. It then gets
email addresses from Windows Addresss Book and sends infected
messages (with Dropper attached) to these addresses.
3. WinSock library is standard MS Visual Studio DLL library that
is used to access Windows sockets.
The worm is able to upgrade its components from Internet website:
it downloads three files from there (that are supposed to be its
plugins), detects their versions, and if these versions are newer
than the currently used, the worm replaces its components with
new ones. So the worm is able to change its functionality
depending on its author needs.
The worm creates new registry key to run itself on each Windows
SysDrv = %SystemDir%\sysmcm.exe
It also creates one more key where it stores its internal data:
Version = 001111
The Sender component code contains the text:
Hi, tracing this file? It's a very friendly program, it do nothing harm to
your system. In fact I hate a file like this, but the bad thing is I cant
find a job, and I need to rent my basement room, I only hope this file
could help me to make my both ends meet. Thanks & regards.
-- The author, Nov 08, 2000.
[Analysis: Eugene Kaspersky, KL; November 2000]