TROJ_CARBERP.NO

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.

It deletes itself after execution.

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%\Documents and Settings\Administrator
• %Application Data%\NVIDIA Corporation
• %Application Data%\NVIDIA Corporation\Update
• %System Root%\DOCUME~1
• %System Root%\DOCUME~1\ADMINI~1
• %User Profile%\LOCALS~1
• %User Temp%\nsy3.tmp
• %Application Data%\Google
• %Application Data%\Google\Update

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %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.. %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.)

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
Google Update = "{random characters}"

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsi1.tmp
• %User Temp%\nsy3.tmp

(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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\
Global\nvUpdate

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\
Global\nvUpdate
value = "20120415"

HKEY_LOCAL_MACHINE\SOFTWARE\NVIDIA Corporation\
Global\nvUpdate
GUID = "b4b43790-fd49-46ca-9845-2917330eda40"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsi2.tmp
• %User Temp%\nsy3.tmp\System.dll
• %Application Data%\NVIDIA Corporation\Update\daemonupd.exe
• %User Startup%\winupdate.lnk

(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.. %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Other Details

This Trojan deletes itself after execution.

This report is generated via an automated analysis system.