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VIRUS NAME: W32/MyLife.a@MM
Internet
Worm Characteristics
This mass-mailing
worm, written in Visual Basic 6, uses Microsoft Outlook to send itself
to all addresses in the Outlook Address book. It arrives in an email containing
the following information:
Subject: my life ohhhhhhhhhhhhh
Attachment: MY LIFE.SCR
The attachment is a UPX packed PE file. When executed on the local machine,
an image is displayed whilst the worm copies itself to the System folder,
and uses Outlook to propagate itself to all address found in the Outlook
Address book.
The following Registry key is added to ensure the worm is executed at
subsequent system startup:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\_
Run 'stmgr' = C:\WINDOWS\SYSTEM\My Life.scr
Upon restarting the machine,
the worm does not propagate again, and the above image is not displayed.
Instead the worm is intended to delete the following system files from the
infected machine:
- *.COM and *.SYS
from C:\
- *.COM, *.SYS,
*.INI and *.EXE from C:\WINDOWS
- *.SYS, *.VXD,
*.EXE and *.DLL from C:\WINDOWS\SYSTEM
However, due to a
bug, this payload fails and no files were observed to be deleted in testing.
Symptoms
Presence of: MY LIFE.SCR (30,720 bytes) in the system directory.
Method Of Infection
When executed, the worm propagates itself to all addresses found in the
Outlook Address book using Micrsoft Outlook. The worm copies itself to
the System folder, modifying the Registry to run this copy at subsequent
startup.
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