Worm/Traxgy.B - Worm

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Summary

Full description

Statistics

Virus:	Worm/Traxgy.B
Date discovered:	30/08/2005
Type:	Worm
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Medium to high
Damage Potential:	Low to medium
Static file:	No
File size:	57.344 Bytes
IVDF version:	6.31.01.196 - Tue, 30 Aug 2005 15:48 (GMT+1)

General Methods of propagation:
   • Email
   • Local network
   • Mapped network drives

Aliases:
   • Kaspersky: Email-Worm.Win32.Rays
   • F-Secure: Email-Worm.Win32.Rays
   • Sophos: W32/Traxg-B
   • Panda: W32/Vinet.A.worm
   • Grisoft: I-Worm/Rays.E
   • Bitdefender: Win32.Rays.H@mm

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops a malicious file
   • Lowers security settings
   • Registry modification

Files It copies itself to the following locations:
   • A:\Explorer.EXE
   • A:\WINDOWS.EXE
   • %drive%:\WINDOWS.EXE
   • %drive%:\ghost.bat
   • %all directories%\%current directory name%.exe

It drops a copy of itself using a filename from a list:
– To: %WINDIR%\\system\ Using one of the following names:
   • %hex number%.com

– To: %WINDIR%\fonts\ Using one of the following names:
   • %hex number%.com

– To: %WINDIR%\\temp\ Using one of the following names:
   • %hex number%.com

– To: %WINDIR%\help\ Using one of the following names:
   • \%hex number%.com

The following files are created:

– Non malicious file:
   • %all directories%\desktop.ini

– A:\NetHood.htm Further investigation pointed out that this file is malware, too. Detected as: VBS/Zapchast.B

– %drive%:\NetHood.htm Further investigation pointed out that this file is malware, too. Detected as: VBS/Zapchast.B

– %all directories%\folder.htt Further investigation pointed out that this file is malware, too. Detected as: VBS/Zapchast.B

Registry One of the following values is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • TempCom = %WINDIR%\\system\%hex number%.com
   • TempCom = %WINDIR%\fonts\%hex number%.com
   • TempCom = %WINDIR%\\temp\%hex number%.com
   • TempCom = %WINDIR%\help\%hex number%.com

The value of the following registry key is removed:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • KaV300XP

The following registry keys are changed:

Various Explorer settings:
– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\
   CabinetState]
   Old value:
   • fullpath = %user defined settings%
   New value:
   • fullpath = dword:00000001

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   Old value:
   • HideFileExt = %user defined settings%
   • Hidden = %user defined settings%
   New value:
   • HideFileExt = dword:00000001
   • Hidden = dword:00000000

Email It uses the Messaging Application Programming Interface (MAPI) in order to send emails. The characteristics are further described:

From:
The sender address is the user's Outlook account.

To:
– Email addresses gathered from WAB (Windows Address Book)

Subject:
The following:
   • %chinese text%

Body:
The body of the email is the following:
   • %chinese text% Document.exe %chinese text%

Attachment:
The filename of the attachment is:
   • Document.exe

The attachment is a copy of the malware itself.

The email looks like the following:

File details Programming language:
The malware program was written in Visual Basic.

See a brief description here.

Description inserted by Andrei Gherman on Fri, 21 Sep 2007 10:34 (GMT+1)
Description updated by Andrei Gherman on Fri, 21 Sep 2007 11:02 (GMT+1)

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