Virus Database

I-Worm.Tettona

Description I-Worm.Tettona

This is the worm virus spreading via the Internet being attached to infected emails. The worm also has backdoor routine.
The worm itself is Windows PE EXE file about 35Kb of length (compressed by Petite, decompressed size - about 75Kb), written in Microsoft Visual C++.
The texts and attached file names in infected messages are different, they depend on current date and Italian language support:
Subjects are:
Incredible.. Incredibile.. Urgente! (vedi allegato) Qualsiasi cosa fai,falla al meglio.

The message body begins with "Hello," or "Ciao," text, then Bodies are:
see this interesting file.
okkio all'allegato ;-)
devi assolutamente vedere il file che ti ho allegato.
apri subito l'allegato,e' MOLTO interessante.

The message body is completed with "A prestoall" or "Bye." text.
Attached files:
tettona.exe
euro.exe
tattoo.exe

The worm activates from infected email only in case a user clicks on attached file. The worm then installs itself to the system, runs spreading routine and backdoor.
Installing
While installing the worm copies itself to Windows directory with the DLLMGR32.EXE name and registers that file in system registry auto-run key:
HKLMSoftwareMicrosoftWindowsCurrentVersionRun DllManager = %windir%dllmgr32.exe
The worm then displays fake error message:
Error
VBRUN49.DLL not found!

Spreading
To send infected messages the worm uses direct connection to default SMTP server, then opens WAB database (Windows Address Book) and sends messages to all addresses found in there.
Backdoor
The backdoor procedure opens connection on port 5001 and listens to the "master". Then it processes following instructions:
"HELO" - replies with "Hello, guy" text
"SCAN" - scans all directories and reports dir/files in there (like remote DIR command)
"EXEC" - runs specified file
"UNINST" - removes itself from the system, including registry "Run" key.
"VIEW" - displays to "master" specified file
"DOWN" - downloads to "master" specified file

Payload
On January 12th the worm displays the message:
Hello,

Ciao,
il tuo computer É infettato dal virus FralÍ.
Certo che devi essere proprio un pirlone,
per esserti fatto fregare dal mio stupidissimo worm.
Va bÉ,vÁ,non ti preoccupare,oggi non sono in vena di cattiverie,
ed É anche un giorno festivo per me.

Buona giornata..
by 4nt4R35

Check other viruses! Be aware! Use Antiviral Software

Macro.Word.Tamago

Description Macro.Word.Tamago

This macro virus affects the system on closing an infected documents and copies itself to documents are closed or saved with new name. It contains seven macros:
Documents NORMAL.DOT
AutoOp AutoOpen
AutoExec AutoExec
AutoClose AutoClose
UtilMacro UtilMacro
FerramMacro FerramMacro
ArquivoModelos ArquivoModelos
ArquivoSalvarComo ArquivoSalvarComo

The virus does not infect the system and documents, if Environment contains the string "TAMAGOXI=GMS" (virus author's self-protection?). In this case the virus displays the MessageBox:
(sLeEp ModE) TaMaGoXI bY WiZaRD: EtERnAl LoVE 2 mY LitTlE gIrL Gi

On 26 of any month the virus writes to the C:AUTOEXEC.BAT instructions that will display the message and delete all files on drive C:
@echo off
cls
echo.
echo.
echo.
echo SaLamA'S CoRP - AlL lEfTS ReSerVeD - 1997
echo TaMaGoXI bY WiZaRD***
echo ***
echo *
echo *
echo *************
echo * *
echo * **** **** *
echo * *
echo * ***** *
echo ***************
echo.
echo eXPecT nO MeRcY FRoM HiM
echo.
echo.
echo File' not found: Serve Alcatara Mane'? (S/N)
echo.
echo.
deltree /y c:*.* >nul

Macro.Word.Target

Description Macro.Word.Target

A silly not encrypted virus. It contains one macro autoOpen and just infects the global macros area and documents on AutoOpen. The length of virus binary image is just 256 bytes.

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