Email-Worm.VBS.Lee

Technical Details

This is a family of Internet worms that use different infection technologies depending on their versions. There are two “basic” worms: “Lee.a” and “Lee.b”. The former spreads via IRC channels, and the latter uses MS Outlook to send infected e-mails. Other worm versions are modifications
and/or combinations of these original ones. All worms are written in Visual Basic Script language (VBS).

I-Worm.Lee.a

This is a simple worm. It spreads through IRC channels by sending an infected file to computers connected to the same channel as the infected computer.

When the worm is activated by a user, it copies itself into a Windows system folder with the name “McAffe.vbs”. Then the worm locates a directory where the mIRC client is installed, and creates the file “SCRIPT.INI” in this directory that contained commands for mIRC client. The worm writes, in this file, commands to send an infected file to every computer that is connected to the same channel as infected computer.

After creating a “SCRIPT.INI” file, the worm creates a mark in the system registry, so, the following time, the worm will not create a “SCRIPT.INI” file if this mark present.

The worm has no payload routine.

I-Worm.Lee.b

This worm spreads via e-mail by sending infected messages from infected computers. While spreading, the worm uses MS Outlook and sends itself to all addresses that are stored in MS Outlook Address Book. As a result, an infected
computer sends the same number of messages to as many addresses that are kept in the MS Outlook contacts list.

The virus operates only on computers on which the Windows Scripting Host (WSH) is installed. In Windwos 98 and Windows 2000, WHS is installed by default. To spread itself, the worm accesses MS Outlook and uses its functions and
address lists available in Outlook 98/2000 only, so the worm is able to spread only in the instance that one of these MS Oulook versions is installed.

Spreading

The worm arrives to a computer as an e-mail message with an attached VBS file that is worm itself. The message in the original worm version contains the following:

Subject: Mail from: Lee@Buxtehude.de

Body:

The Best Firewall under Windows is…> BlackIce.

BUGFIX des Monats:

Windoof 2000.
Du kannst Dich, auf jedem Windoos 2000 Server als Gast einloggen.
Und hast trotzdem vollen Zugriff auf fast alle gesperrten Dateien, auf die normale
Anwender keinen Zugriff haben d#rfen.
Wie zb. die Boot.ini…ts..ts..ts

LEBENSHILFE……:

99% aller Pc Probleme befinden sich zwischen Tastatur und Stuhl.
Die, die k�nnen, tun. Die, die nicht k�nnen, simulieren.
Ein Hacker macht einen Fehler nur einmal versehentlich. Dann immer mit Absicht.
Wenn 2 sich 1 sind und nicht 8 geben, dann sind es in 9 Monaten 3.

By Euer Lee

Attached file name: Independance Day.vbs

Upon being activated by a user (by double clicking on an attached file), the worm opens MS Outlook, gains access to the Address Book, obtains all addresses from there and sends messages with its attached copy to all of them. The message subject, body and attached file name are the same as above.

To prevent duplicate messages from being sent from an already infected computer, the worm creates a mark in the system registry. The worm does not send messages if this mark is present.

The worm has no payload routine.

I-Worm.Lee.c

This worm variant is very close to the “Lee.b” variant. It has a few changes and additions in its code:

An infected message contains:

Subject: Ncc1701e

Body:

Hi, this is Ncc1701e speaking to all Borg’s in the Galaxy..!
You must die..Assimilation to all Terranien Guys…

Attached file name: Picard.vbs

When the worm is activated, it copies itself into the Windows directory with the name “Picard.vbs”, and registers this file in the system registry in the autostart section:

HKLMSOFTWAREMicrosoftWindowsCurrentVersionRunStartTrek = “wscript.exe Picard.vbs”

As a result, the worm activates upon each Windows startup.

A comment string is added to the beginning of the code:

‘Worm Created by Lee from Germany

I-Worm.Lee.d

This is hybrid of the “Lee.a” and “Lee.b” variants. The infected message contains:

Subject: Mail from: Osterhase@Ostern.de

Body:

Hello..
Check This!
This is our death..
My Name are Lee..
I am come from Germany..
And i hate Lucky2000..there are stole
my Opinion Worm. I hate too Duke from DVL
My favorite page are Coderz.Net..Thx:Evul to hostet
my Site…Har Har Har..

Ein Geiler Trick von mir…..
via Telnet.

Als erstes geht ihr aud die Startseite von Windoof, dort auf den Men#punkt ausf#hren,
Dort gebt ihr >Telnet< ein und dr#ckt Return.
das Microschrott Terminal Telnet �ffnet sich in einem Fenster
. Ihr baut jetzt eure Verbindung auf und geht auf Verbinden,
Danach auf Netzwerk-system und gebt z.b. ein:
mail.compuserve.com 25 ( wenn ihr Compuserve verwendet,
entsprechendes gilt f#r T-Online, Aol oder bei welchen Provider ihr angemeldet seid.)
Der Server meldet sich dann mit einem Connect an.
Ihr tippt dann “helo”. Das Helo mu- als erstes stehen, was danach kommt, ist egal.
Jetzt schreibt ihr: Mail from:
Bill_Gates@Microsoft.com (nur als Beispiel) Ihr dr#ckt dann Return,
und schreibt den Em�f�nger: em�f�nger@sein provider.de (exacte Email adresse).
Und wieder Return Taste und dann kommt die
Nachricht: 250 em�f�nger@sein provider.de…recipient ok.
Jetzt nur “data” eintippen und Euren Text, den

die Email haben soll und macht dann einen Punkt “.” und haut noch ein mal auf die Return taste.
Und das war es dann schon, der Empf�nger wird sich wundern…:-)…..

Euer Lee

Attached file name: Osterhase.vbs

The warm has comment string at the end of code:

‘Osterhase@Ostern.de from Lee

I-Worm.Lee.e

The same as “Lee.d”, but additionally registers itself in the system registry in the autostart section:

HKLMSOFTWAREMicrosoftWindowsCurrentVersionRunLee = “wscript.exe Ds9.vbs”

As a result, the worm activates upon each Windows startup.

The infected message contains:

Subject: Hi check This…
Body: Hello..your Game is Over..By Q from Lee
Attached file name: Ds9.vbs

I-Worm.Lee.f

This is slight polymorphic variant of “Lee.c”. It contains a routine that randomly changes variable names in the worm code.

The infected message contains:

Subject: New Outlook Security tool

Body:

Dear User !
Here is the New Security Outlook tool.
No more Vb-Viruses.
Sincerly: Lee@Microsoft.com

Attached file name: Update.vbs