TROJ_FAM_00003be.TOMA

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan creates the following folders:

• %System Root%\DOCUME~1
• %System Root%\DOCUME~1\ADMINI~1
• %User Profile%\LOCALS~1
• %User Temp%\nso3.tmp
• %Program Files%\InternetGameBox
• %Program Files%\InternetGameBox\ressources
• %Program Files%\InternetGameBox\skins
• %Start Menu%\Programs\InternetGameBox
• ressources
• ressources\favoris
• %Program Files%\InternetGameBox\ressources\favoris

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
sfkel = "%Application Data%\sfkel.exe sfkel"

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsz1.tmp
• %User Temp%\nso3.tmp
• ressources\favoris\defaultv2.swf
• %Windows%\SoftwareDistribution\DataStore\Logs\edbtmp.log

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\IGB

HKEY_LOCAL_MACHINE\Software\IGB

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel

HKEY_CURRENT_USER\Software\LanConfig

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
nums = "FC2nSsaAAA-FA59LUnAAA"

HKEY_CURRENT_USER\Software\IGB
nums = "FC2nSsaAAA-FA59LUnAAA"

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
grpid = "371"

HKEY_CURRENT_USER\Software\IGB
grpid = "371"

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
InstallOpt1 = "1"

HKEY_CURRENT_USER\Software\IGB
InstallOpt1 = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
installdt = "20080505"

HKEY_CURRENT_USER\Software\IGB
installdt = "20080505"

HKEY_CURRENT_USER\Software\IGB
uai = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
DisplayName = "InternetGameBox "

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
UninstallString = "%Program Files%\InternetGameBox\uninst.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
UninstallString2 = "%Program Files%\InternetGameBox\uninst.exe /S"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
DisplayIcon = "%Program Files%\InternetGameBox\InternetGameBox.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
URLInfoAbout = "http://www.{BLOCKED}etgamebox.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
InternetGameBox
Publisher = "OOO «Favorit»"

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
Installer Language = "1033"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel
DisplayName = "Favorit"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel
UninstallString = "%Application Data%\sfkel.exe -uninstall"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel
NoRemove = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
sfkel
NoRepair = "1"

HKEY_CURRENT_USER\Software\LanConfig
LAN = "UP"

HKEY_LOCAL_MACHINE\SOFTWARE\IGB
bnrid = "672125"

It modifies the following registry entries:

HKEY_CURRENT_USER\SessionInformation
ProgramCount = "2"

(Note: The default value data of the said registry entry is 2.)

HKEY_CURRENT_USER\SessionInformation
ProgramCount = "1"

(Note: The default value data of the said registry entry is 2.)

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsz2.tmp
• %User Temp%\nso3.tmp\LangDLL.dll
• %User Temp%\nso3.tmp\ioSpecial.ini
• %User Temp%\nso3.tmp\modern-wizard.bmp
• %User Temp%\nso3.tmp\modern-header.bmp
• %User Temp%\nso3.tmp\InstallOptions.dll
• %Application Data%\sfkel.exe
• %Program Files%\InternetGameBox\InternetGameBox.exe
• %Program Files%\InternetGameBox\ressources\configv2_fr.xml
• %Program Files%\InternetGameBox\ressources\configv2_en.xml
• %Program Files%\InternetGameBox\ressources\configv2_es.xml
• %Program Files%\InternetGameBox\skins\skinv2.skn
• %Program Files%\InternetGameBox\language
• %Start Menu%\Programs\InternetGameBox\InternetGameBox.lnk
• %Start Menu%\Programs\InternetGameBox\Uninstall.lnk
• %Desktop%\InternetGameBox.lnk
• %Program Files%\InternetGameBox\uninst.exe
• %Temp%\msksetup.log
• %System%\nvs2.inf
• %Application Data%\sfkel.dat
• %User Temp%\sfkelpi.tmp
• %Application Data%\sfkel_m2s.xml
• %Application Data%\sfkel_m2s.zl
• %Application Data%\sfkel_s2m.zl
• %Application Data%\sfkel_s2m.xml
• %User Temp%\sfkelup.tmp
• %Application Data%\sfkel_navps.dat
• %Program Files%\InternetGameBox\ressources\AttenteOn.html
• %Program Files%\InternetGameBox\ressources\AttenteOff.html

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.. %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.. %Program Files% is the default Program Files folder, usually C:\Program Files.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Profiles\{user name}\Start Menu on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu on Windows NT and C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003.. %Desktop% is the current user's desktop, which is usually C:\Windows\Profiles\{user name}\Desktop on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Desktop on Windows NT, and C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003.. %Temp% is the Windows Temporary folder, which is usually C:\Windows\Temp or C:\WINNT\Temp.. %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://{BLOCKED}ty-updater.comSA/cpi.php?{random characters}
• http://{BLOCKED}ty-updater.comSA/receive_data.php3?tcpc=59218
• http://{BLOCKED}ty-updater.combinaries/bin.php?id=0&up=1&fd=1&tcpc=59578
• http://{BLOCKED}ty-updater.combinaries/bin.php?id=0&up=1&fd=1&tcpc=62062
• http://updates.{BLOCKED}-network.combinaries/bin.php?id=0&up=1&fd=1&tcpc=83328
• http://www.{BLOCKED}etgamebox.com/igb/defaultv2.swf

This report is generated via an automated analysis system.