VBS/CoolNot is a worm, similar to the VBS/LoveLetter.
VBS/CoolNot.A uses Outlook to sent itself to all recipients in every
address book. The message that it sends is as follows:
Subject: Cool Notepad Demo
Body: Hey check out this text file I sent it will do
something neat in notepad.
Enjoy :-)
Attachment: COOL_NOTEPAD_DEMO.TXT.vbs
It copies itself to the Windows System directory as
"COOL_NOTEPAD_DEMO.TXT.vbs" and adds a key to the registry so that it
will be executed next time the system is restarted.
Then the worm replaces the "script.ini" file from the mIRC installation
directory. The worm uses this modification to send itself to those users
who join to the same channel as the infected user. In addition, the worm
will join to the "#virus" channel and send a message "Cool Notepad Demo"
to that channel.
As a payload, the worm adds a registry key that will hide the desktop
after the system is restarted. This registry key is:
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\NoDesktop
To restore your desktop, please download and execute the following
registry file: ftp://ftp.F-Secure.com/anti-virus/tools/coolnote.reg
[Analysis: Katrin Tocheva and Sami Rautiainen, F-Secure]
