TROJ_BUZUS.DEQ

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 drops the following copies of itself into the affected system:

• %User Profile%\Microsoft\RAVCpl64.exe
• %Application Data%\Google\GoogleCrashHandler.exe

(Note: %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.. %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.)

It creates the following folders:

• %Application Data%\Google

(Note: %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.)

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
RtHDVBg = "%User Profile%\Microsoft\RAVCpl64.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Gupdate = "%Application Data%\Google\GoogleCrashHandler.exe"

Other System Modifications

This Trojan deletes the following files:

• %User Profile%\Microsoft\taskhost.exe
• %Application Data%\Microsoft\taskhost.exe
• %Application Data%\google\CrashHandler.exe
• %Temporary Internet Files%\Content.IE5\ZDGZNKA5\table_right3[1].png
• %Temporary Internet Files%\Content.IE5\BVLBNMKH\header00b[1].gif
• %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_left3[1].png
• %Temporary Internet Files%\Content.IE5\09RWHJQN\top_left3[1].png
• %Temporary Internet Files%\Content.IE5\ZDGZNKA5\top_right3[1].png
• %Temporary Internet Files%\Content.IE5\BVLBNMKH\box08[1].gif
• %Temporary Internet Files%\Content.IE5\09RWHJQN\box02[1].gif
• %Temporary Internet Files%\Content.IE5\ZDGZNKA5\box06[1].gif
• %Temporary Internet Files%\Content.IE5\ZSGKJKO6\footer00[1].gif
• %Temporary Internet Files%\Content.IE5\BVLBNMKH\table_bottom3[1].png
• %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_left3[1].png
• %Temporary Internet Files%\Content.IE5\BVLBNMKH\box04[1].gif
• %Temporary Internet Files%\Content.IE5\ZSGKJKO6\table_top3[1].png
• %Temporary Internet Files%\Content.IE5\ZDGZNKA5\background[1].gif
• %Temporary Internet Files%\Content.IE5\09RWHJQN\bottom_right3[1].png
• %User Profile%\Microsoft\JavaUpdate.exe
• %Application Data%\Microsoft\JavaUpdate.exe
• %User Profile%\Microsoft\services.exe
• %Application Data%\google\system.exe

(Note: %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.. %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.)

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main\FeatureControl\
FEATURE_BROWSER_EMULATION
{malware file name} = "22b8"

Other Details

This Trojan connects to the following possibly malicious URL:

• http://www.{BLOCKED}isport.it/shop/svhost.exe

This report is generated via an automated analysis system.