Detect date

Parent class: VirWare

Viruses and worms are malicious programs that self-replicate on computers or via computer networks without the user being aware; each subsequent copy of such malicious programs is also able to self-replicate. Malicious programs which spread via networks or infect remote machines when commanded to do so by the “owner” (e.g. Backdoors) or programs that create multiple copies that are unable to self-replicate are not part of the Viruses and Worms subclass. The main characteristic used to determine whether or not a program is classified as a separate behaviour within the Viruses and Worms subclass is how the program propagates (i.e. how the malicious program spreads copies of itself via local or network resources.) Most known worms are spread as files sent as email attachments, via a link to a web or FTP resource, via a link sent in an ICQ or IRC message, via P2P file sharing networks etc. Some worms spread as network packets; these directly penetrate the computer memory, and the worm code is then activated. Worms use the following techniques to penetrate remote computers and launch copies of themselves: social engineering (for example, an email message suggesting the user opens an attached file), exploiting network configuration errors (such as copying to a fully accessible disk), and exploiting loopholes in operating system and application security. Viruses can be divided in accordance with the method used to infect a computer:
  • file viruses
  • boot sector viruses
  • macro viruses
  • script viruses
Any program within this subclass can have additional Trojan functions. It should also be noted that many worms use more than one method in order to spread copies via networks.

Class: Email-Worm

Email-Worms spread via email. The worm sends a copy of itself as an attachment to an email message or a link to its file on a network resource (e.g. a URL to an infected file on a compromised website or a hacker-owned website). In the first case, the worm code activates when the infected attachment is opened (launched). In the second case, the code is activated when the link to the infected file is opened. In both case, the result is the same: the worm code is activated. Email-Worms use a range of methods to send infected emails. The most common are: using a direct connection to a SMTP server using the email directory built into the worm’s code using MS Outlook services using Windows MAPI functions. Email-Worms use a number of different sources to find email addresses to which infected emails will be sent: the address book in MS Outlook a WAB address database .txt files stored on the hard drive: the worm can identify which strings in text files are email addresses emails in the inbox (some Email-Worms even “reply” to emails found in the inbox) Many Email-Worms use more than one of the sources listed above. There are also other sources of email addresses, such as address books associated with web-based email services.

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Platform: VBS

Visual Basic Scripting Edition (VBScript) is a scripting language interpreted by Windows Script Host. VBScript is widely used to create scripts on Microsoft Windows operating systems.


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).


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.


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.


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:

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


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.


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

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


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

Subject: Mail from:

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: 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: (nur als Beispiel) Ihr dr#ckt dann Return,
und schreibt den Em�f�nger: em�f�nger@sein (exacte Email adresse).
Und wieder Return Taste und dann kommt die
Nachricht: 250 em�f�nger@sein 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:

' from Lee


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


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

Dear User !
Here is the New Security Outlook tool.
No more Vb-Viruses.

Attached file name: Update.vbs

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