Virus Database

Bengal.846

Description Bengal.846

These are harmless memory resident parasitic viruses. They hook INT 21h and write themselves at the end of COM- and EXE-files that are executed, and they infect the files only if the ScrollLock key is pressed. On installation they hit COMMAND.COM file. They contain the internal text string:
COMSPEC=
# Bengal Tiger, v3p0x #
# By Trurl, the great constructor, 1993#
# Buenos Aires, Argentina #
Trurl

Check other viruses! Be aware! Use Antiviral Software

I-Worm.LoveLetter

Description I-Worm.LoveLetter

This is the Internet worm that caused the global epidemic at the beginning of May 2000. The worm spreads via e-mail by sending infected messages from affected computers. While spreading, the worm uses MS Outlook and sends itself to all addresses that are stored in the MS Outlook Address Book. As a result, an infected computer sends as many messages to as many addresses that are kept in the MS Outlook contacts list.
The worm is written in the scripting language "Visual Basic Script" (VBS). It operates only on computers on which the Windows Scripting Host (WSH) has been installed. In Windows 98 and Windows 2000, WHS is installed by default. To spread itself, the worm accesses MS Outlook and uses its functions and address lists, which is available in Outlook 98/2000 only, so the worm is able to spread only in case one of these MS Oulook versions is installed.
When run, the worm sends its copies by e-mail, installs itself into the system, performs destructive actions, downloads and installs a Trojan program. The worm also has the ability to spread through the mIRC channels.
The worm contains "copyright" strings:
barok -loveletter(vbe) < i hate go to school >
by: spyder / ispyder@mail.com / @GRAMMERSoft Group / Manila,Philippines
Spreading
The worm arrives to a computer as an e-mail message with an attached VBS file that is the worm itself. The message in the original worm version has:
The Subject: ILOVEYOU
Message body: kindly check the attached LOVELETTER coming from me.
Attached file name: LOVE-LETTER-FOR-YOU.TXT.vbs

Upon activation by a user, (by double clicking on an attached file) the worm opens MS Outlook, gains access to the Address Book, gets 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.
The worm also installs itself into the system. It creates its copies in the Windows directories with the names:
in Windows directory: WIN32DLL.VBS

in Windows system directory: MSKERNEL32.VBS, LOVE-LETTER-FOR-YOU.TXT.VBS

These files are then registered in the Windows auto-run section in the system registry:
HKLMSoftwareMicrosoftWindowsCurrentVersionRunMSKernel32 = MSKERNEL32.VBS

HKLMSoftwareMicrosoftWindowsCurrentVersionRunServicesWin32DLL = Win32DLL.VBS
As a result, the worm is re-activated each time Windows boots up.
The worm also creates a HTM dropper in the Windows system directory to use it while spreading to mIRC channels (see below). This copy has the following name:
LOVE-LETTER-FOR-YOU.TXT.HTM
Downloading a Trojan file
To install the Trojan program to the system, the worm modifies the URL to the Internet Explorer start page. The new URL points to a Web site (randonly selected from four variants) and forces Explorer to download an EXE file from there. That file has the WIN-BUGSFIX.EXE name and is the Trojan program. The worm then registers this file in the system registry in an auto-run section:
HKLMSoftwareMicrosoftWindowsCurrentVersionRunWIN-BUGSFIX = WIN-BUGSFIX.exe
Upon the next run, Internet Exlorer downloads the Trojan and stores it in the Download directory in the system. Upon the next Windows startup, the Trojan gets control, and copies itself to the Windows system directory with WINFAT32.EXE name.
When the Trojan has been installed into the system, the worm sets the Internet Explorer start page to blank ("about:blank").
The downloaded and installed file is a password-stealing Trojan. It obtains the local machine name and IP address, network login(s) and password(s), RAS information, etc., and sends them to the Trojan host. The samples that have been analyzed send messages to "mailme@super.net.ph", the message subject looks like what follows:
Barokall email.passwords.sender.trojan
Spreading to IRC channels
The worm scans local drives and looks for files:
MIRC32.EXE, MLINK32.EXE, MIRC.INI, SCRIPT.INI, MIRC.HLP
In case at least one of these files is found in a subdirectory, the worm drops a new SCRIPT.INI file to there. That file contains mIRC instructions that send a worm copy (the LOVE-LETTER-FOR-YOU.TXT.HTM file) to all users that join to the infected IRC channel.
The SCRIPT.INI file contains the comments:
mIRC Script
Please dont edit this script... mIRC will corrupt, if mIRC will
corrupt... WINDOWS will affect and will not run correctly. thanks

Khaled Mardam-Bey
http://www.mirc.com
When an IRC user receieves that infected HTML, it is copied to an IRC download directory. The worm then is activated from that file only in case the user clicks it on. Because the browser's security settings don't allow scripts to access disk files and display a warning message, the worm uses a trick to avoid that. First, it displays a message to fool the user:
This HTML file need ActiveX Control
To Enable to read this HTML file
- Please press 'YES' button to Enable ActiveX
In case the user really clicks 'YES' the worm gets access to disk files and installs itself into the system. It drops its VBS code to the Windows system directory with the MSKERNEL32.VBS name and registers it in the Windows auto-run section in system registry:
HKLMSoftwareMicrosoftWindowsCurrentVersionRunMSKernel32 = MSKERNEL32.VBS
In case 'NO' is chosen, the worm intercepts the mouse movement and keypress events and reloads itself then. As a result, a user receives a warning message in an endless loop until it presses 'YES'.
Destructive action
The worm scans the subdirectory trees on all available local and mapped drives, lists all files there and depending on the filename extension, performs actions:
VBS, VBE: the worm overwrites these files with its VBS body. As a result, all VBS and VBE programs in the system are overwritten with worm code.
JS, JSE, CSS, WSH, SCT, HTA: the worm creates a new file with an original filename plus ".VBS" extention and deletes original file; i.e., the worm overwrites these files with its code and renames them with VBS extension. For example, "TEST.JS" becowes "TEST.VBS".
JPG, JPEG: the worm does the same as above, but adds a ".VBS" extension to the full file name (does not rename to ".VBS"). For example, "PIC1.JPG" becomes "PIC1.JPG.VBS".
MP2, MP3: the worm creates a new file with a ".VBS" extension (for "SONG.MP2", the worm creates the "SONG.MP2.VBS" file), writes its code to there and sets the file attribute "hidden" for the original file.
Other variants
The worm itself is a text script program, and it is spread in text source form. The worm's code may be easily modified by hackers, and as a result, there are many variants of the original worm. Most of them are just minor remakes and differ to the original worm just in details - there are message-fields text changed, different file names, different set of affected disk files extensions (for example, .BAT and .INI).
The Subject, message body and attached file name in different variants appear as listed below (the first block belongs to original worm version):
Subject/body/attach name

ILOVEYOU
kindly check the attached LOVELETTER coming from me.
LOVE-LETTER-FOR-YOU.TXT.vbs

Mothers Day Order Confirmation
We have proceeded to charge your credit card for the amount of $326.92
for the mothers day diamond special. We have attached a detailed
invoice to this email. Please print out the attachment and keep it in a
safe place.Thanks Again and Have a Happy Mothers Day!
mothersday@subdimension.com
mothersday.vbs

fwd: Joke
- no message body in message
Very Funny.vbs

Susitikim shi vakara kavos puodukui...
kindly check the attached LOVELETTER coming from me.
LOVE-LETTER-FOR-YOU.TXT.vbs

Important ! Read carefully !!
Check the attached IMPORTANT coming from me !
IMPORTANT.TXT.vbs

Dangerous Virus Warning
There is a dangerous virus circulating.
Please click attached picture to view it and learn to avoid it.
virus_warning.jpg.vbs

How to protect yourself from the IL0VEY0U bug!
Here's the easy way to fix the love virus.
Virus-Protection-Instructions.vbs

Thank You For Flying With Arab Airlines
Please check if the bill is correct, by opening the attached file.
ArabAir.TXT.vbs

Bewerbung Kreolina
Sehr geehrte Damen und Herren!
BEWERBUNG.TXT.vbs

LOOK!
hehe...check this out.
LOOK.vbs

Variant Test
This is a variant to the vbs virus.
IMPORTANT.TXT.vbs

Yeah, Yeah another time to DEATH...
This is the Killer for VBS.LOVE-LETTER.WORM.
Vir-Killer.vbs

I Cant Believe This!!!
I Cant Believe I Have Just Recieved This Hate Email .. Take A Look!
KillEmAll.TXT.vbs

New Variation on LOVEBUG Update Anti-Virus!!
There is now a newer variant of love bug. It was released at
8:37 PM Saturday Night. Please Download the fo llowing patch.
We are trying to isolate the virus. Thanks Symantec.
antivirusupdate.vbs

IMPORTANT: Official virus and bug fix
This is an official virus and bug fix. I got it from our system admin.
It may take a short while to update your system files after you run the
attachment.
Bug and virus fix.vbs

Recent Virus Attacks-Fix
Attached is a copy of a script that will reverse the effect of
the LOVE-LETTER-TO-YOU.TXT.vbs as well as the FW:JOKE,
Mother's Day and Lituanian Siblings.
BAND-AID.DOC.vbs

PresenteUOL
O UOL tem um grande presente para voce, e eh exclusivo.
Veja o arquivo em anexo.
http://www.uol.com.br
UOL.TXT.vbs

BUG & VIRUS FIX
I got this from our system admin. Run this to help pervent a ny recent or
future bug & virus attack's. It may take a small while up update your files.
MAJOR BUG & VIRUS FIX.vbs
FREE SEXSITE PASSWORDS
cHECK IT OUT ; FREE SEX SITE PASSWORDS.
FREE SEXSITE PASSWORDS.HTML.vbs

You May Win $1,000,000! 1 Click Away
kindly check the attached WIN coming from me.
WIN.vbs

Virus Warnings !!!
VERY IMPORTANT PLEASE READ THIS TEXT. TEXT ATTACHMENT.
very-important-txt.vbs

HOW TO BEAT VIRUSES
kindly check the attached VIRUS INFORMATION coming from me.
This is how you can be immune to any virus. It really helps alot!
HOW_TO_BEAT_VIRUSES.TXT.vbs

You must read this!
Have you read this text? You must do it!!
C:NOTES.TXT.exe

New virus discovered!
A new virus has been discovered! It's name is @-@Alha and Omega@-@.
Full list of virus abilities is included in attached file @-@info.txt@-@.
For the last information go to McAfee's web page
Please forward this mesage to everyone you care about.
info.txt.vbs

Wish you were Here!
Wish you were Here! Im having a great time!
Wish you were Here!.postcard.vbs

I-Worm.LoveLetter.b

Description I-Worm.LoveLetter.b

I-Worm.LoveLetter.b (see also I-Worm.LoveLetter) destroys all files with extensions INI and BAT instead of files with extensions JPG and JPEG. It sets another start page for Internet Explorer, and the message is different.
The letter's subject is:
Mothers Day Order Confirmation
Message body:
We have proceeded to charge your credit card for the amount of $326.92 for the mothers day diamond special. We have attached a detailed invoice to this email. Please print out the attachment and keep it in a safe place.Thanks Again and Have a Happy Mothers Day! mothersday@subdimension.com
Attached file name:
mothersday.vbs

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