Worm/VB.EX - Worm

See also

Summary

Full description

Statistics

Virus:	Worm/VB.EX
Date discovered:	08/01/2007
Type:	Worm
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Medium to high
Damage Potential:	Medium
Static file:	Yes
File size:	133.632 Bytes
MD5 checksum:	c140fa018a75e964c287f254a55fa5e6
IVDF version:	6.37.00.117

General Methods of propagation:
   • Email
   • Local network

Aliases:
   • Mcafee: W32/MoonLight.worm
   • Kaspersky: Email-Worm.Win32.VB.co
   • Sophos: W32/Bobandy-F
   • Eset: Win32/NoonLight.X
   • Bitdefender: Worm.Moonlight.A

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

Side effects:
   • Disable security applications
   • Drops files
   • Drops malicious files
   • Uses its own Email engine
   • Lowers security settings
   • Records keystrokes
   • Registry modification

Files It copies itself to the following locations:
   • %WINDIR%\%random character string%\service.exe
   • %WINDIR%\%random character string%\winlogon.exe
   • %WINDIR%\%random character string%\system.exe
   • %WINDIR%\%random character string%\regedit.cmd
   • %WINDIR%\%random character string%\smss.exe
   • %WINDIR%\%random character string%\%random character string%.com
   • %WINDIR%\%random character string%\%random character string%.exe
   • %WINDIR%\lsass.exe
   • %SYSDIR%\%random character string%\%random character string%.cmd
   • %WINDIR%\%random character string%.exe
   • %SYSDIR%\%random character string%.exe
   • %home%\My Documents\%all subdirectories%\%current directory name%.exe
   • C:\RealPlayer13-5GOLD.exe
   • C:\Icon Cool-Editor 3.4.30315.exe
   • C:\CheatEngine52.exe
   • C:\framework-4.4.exe
   • C:\Vista Transformation Pack 4.0.exe
   • C:\Pack_Vista_Inspirat_1.6.exe
   • C:\DeepUnfreezerU1.6.exe
   • C:\Len
   • C:\Pack_Longhorn_Inspirat_1.6_code32547.exe
   • C:\TeamViewer_Setup.exe
   • C:\Licence.exe
   • C:\Pictures.exe
   • C:\Secret.exe
   • C:\Documents.exe
   • C:\Vivid.exe
   • C:\update.exe
   • C:\XXX.exe
   • C:\cool.exe
   • C:\vitae.exe
   • C:\error.exe

It copies itself within an archive to the following location:
   • %WINDIR%\%random character string%\MYpIC.zip

It creates the following directory:
   • %WINDIR%\%random character string%

The following files are created:

– Non malicious file:
   • %WINDIR%\onceinabluemoon.mid

– %SYSDIR%\systear.dll
– %WINDIR%\MooNlight.txt This is a non malicious text file with the following content:
   • [Lunalight]

     I-WorM.LunaLIGHT.b Aliase W32/MoonLight.P@mm
     Copyleft @ Devil.inc

– %WINDIR%\moonlight.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Moonlight.DLL.Dam

– %SYSDIR%\msvbvm60.dll
– %WINDIR%\cypreg.dll

Registry The following registry keys are added in order to run the processes after reboot:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "%random character string%"="%SYSDIR%\%random character string%.exe"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "%random character string%"="%WINDIR%\%random character string%.exe"

The values of the following registry keys are removed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "avgnt"
   • "drv_st_key"
   • "norman_zanda"
   • "MSMSG"
   • "Winamp"
   • "Word"
   • "Driver"
   • "WinUpdateSupervisor"
   • "Task"
   • "dago"
   • "SMA_nya_Artika"
   • "Putri_Indonesia"
   • "BabelPath"
   • "Alumni Smansa"
   • "ViriSetup"
   • "SMAN1_Pangkalpinang"
   • "Putri_Bangka"
   • "SysYuni"
   • "SysDiaz"
   • "SysRia"
   • "Pluto"
   • "DllHost"
   • "SaTRio ADie X"
   • "Tok-Cirrhatus"
   • "AllMyBallance"
   • "MomentEverComes"
   • "TryingToSpeak"
   • "YourUnintended"
   • "YourUnintendes"
   • "lexplorer"
   • "dkernel"
   • "Bron-Spizaetus"
   • "ADie suka kamu"
   • "winfix"
   • "templog"
   • "service"
   • "Grogotix"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "avgnt"
   • "drv_st_key"
   • "norman_zanda"
   • "MSMSG"
   • "Winamp"
   • "Word"
   • "Driver"
   • "WinUpdateSupervisor"
   • "Task"
   • "dago"
   • "SMA_nya_Artika"
   • "Putri_Indonesia"
   • "BabelPath"
   • "Alumni Smansa"
   • "ViriSetup"
   • "SMAN1_Pangkalpinang"
   • "Putri_Bangka"
   • "SysYuni"
   • "SysDiaz"
   • "SysRia"
   • "Pluto"
   • "DllHost"
   • "SaTRio ADie X"
   • "Tok-Cirrhatus"
   • "AllMyBallance"
   • "MomentEverComes"
   • "TryingToSpeak"
   • "YourUnintended"
   • "YourUnintendes"
   • "lexplorer"
   • "dkernel"
   • "Bron-Spizaetus"
   • "ADie suka kamu"
   • "winfix"
   • "templog"
   • "service"
   • "Grogotix"

The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   Old value:
   • "Shell"="Explorer.exe"
   New value:
   • "Shell"="explorer.exe, "%WINDIR%\%random character string%\%random character string%.exe""

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   Old value:
   • "load"=""
   New value:
   • "load"=""%WINDIR%\%random character string%\%random character string%.com""

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

– [HKCR\scrfile]
   Old value:
   • @="Screen Saver"
   New value:
   • @="File Folder"

– [HKCR\exefile]
   Old value:
   • @="Application"
   New value:
   • @="File Folder"

– [HKLM\SOFTWARE\Classes\exefile]
   Old value:
   • @="Application"
   New value:
   • @="File Folder"

Deactivate Windows XP Firewall:
– [HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess]
   Old value:
   • "Start"=%user defined settings%
   New value:
   • "Start"=dword:00000000

Various Explorer settings:
– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\SuperHidden]
   Old value:
   • "UncheckedValue"=%user defined settings%
   New value:
   • "UncheckedValue"=dword:00000000

– [HKLM\SOFTWARE\Policies\Microsoft\Windows NT\SystemRestore]
   Old value:
   • "DisableConfig"=%user defined settings%
   • "DisableSR"=%user defined settings%
   New value:
   • "DisableConfig"=dword:00000001
   • "DisableSR"=dword:00000001

– [HKLM\SYSTEM\ControlSet001\Control\SafeBoot]
   Old value:
   • "AlternateShell"="cmd.exe"
   New value:
   • "AlternateShell"="%random character string%.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\msconfig.exe]
   New value:
   • "debugger"="%WINDIR%\notepad.exe"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\regedit.exe]
   New value:
   • "debugger"="%WINDIR%\%random character string%\regedit.cmd"

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\
   Image File Execution Options\rstrui.exe]
   New value:
   • "debugger"="%WINDIR%\notepad.exe"

Email It contains an integrated SMTP engine in order to send emails. A direct connection with the destination server will be established. The characteristics are described in the following:

From:
Generated addresses. Please do not assume that it was the sender's intention to send this email to you. He might not know about his infection or might not even be infected at all. Furthermore it is possible that you will receive bounced emails telling you that you are infected. This might also not be the case.

To:
– Email addresses found in specific files on the system.

Subject:
One of the following:
   • Tolong Aku..
   • Tolong
   • Aku Mencari Wanita yang aku Cintai
   • miss Indonesian
   • Cek This
   • hello
   • Japannes Porn

Body:
The body of the email is one of the lines:
   • dan cara menggunakan email mass
   • ini adalah cara terakhirku ,di lampiran ini terdapat
   • foto dan data Wanita tsb Thank's
   • NB:Mohon di teruskan kesahabat anda
   • aku mahasiswa BSI Margonda smt 4
   • yah aku sedang membutuhkan pekerjaan
   • oh ya aku tahu anda dr milis ilmu komputer
   • di lampiran ini terdapat curriculum vittae dan foto saya
   • hi
   • hey Indonesian porn
   • Agnes Monica pic's
   • Fucking With Me :D
   • please read again what i have written to you
   • Hot ...

Attachment:
The filename of the attachment is one of the following:
   • Doc %seven-digit random character string%.zip
   • file %seven-digit random character string%.zip
   • hell %seven-digit random character string%.zip
   • Miyabi %seven-digit random character string%.zip
   • nadine %seven-digit random character string%.zip
   • need you %seven-digit random character string%.zip
   • thisfile %seven-digit random character string%.zip
   • video %seven-digit random character string%.zip

The attachment is an archive containing a copy of the malware itself.

The email may look like one of the following:

Mailing Address generation for FROM field:
To generate addresses it uses the following strings:
   • Anton; Firmansyah; Joko; Titta; Lanelitta; Ami; Riri; Fransisca;
      Claudia; Fransiska; Cicilia; sisilia; Hilda; Nadine; Ida; Julia; Nana;
      Joe; CoolMan; Vivi; Valentina; Linda; Rita; sasuke; Davis; Anata;
      Emily; HellSpawn; Lia; Fria; admin; SaZZA; Susi; Agnes; JuwitaNingrum;
      Natalia

The domain is one of the following:
   • Lovemail.com
   • hackersmail.com
   • hotmail.com
   • gmail.com
   • msn.com
   • yahoo.com.sg
It does not send emails to addresses containing one of the following strings:
   • security; avira; norman; norton; panda; mcafee; Syman; sophos; Trend;
      vaksin; novell; virus
In order to get the IP address of the mail server it has the ability to prepend the following strings to the domain name:
   • smtp.
   • mail.
   • ns1.
   • mx1.
   • mail1.
   • mx.
   • mxs.
   • relay.
   • gate.

Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.

It drops copies of itself to the following network shares:
• \IPC$
• \ADMIN$

Stealing It tries to steal the following information:

– A logging routine is started after keystrokes are typed that match one of the following strings:
   • Friendster
   • yahoo
   • gmail
   • login
   • bank
   • hotmail

– It captures:
    • Keystrokes

Miscellaneous Checks for an internet connection by contacting the following web site:
• www.google.com

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

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
• UPX

See a brief description here.

Description inserted by Adriana Popa on Fri, 09 Nov 2007 13:45 (GMT+1)
Description updated by Adriana Popa on Fri, 09 Nov 2007 15:59 (GMT+1)

» About Malware
» About Phishing
» Viruses In the Wild

« back