TROJ_FAKEAV.USB15VC

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%\DOCUME~1
• %System Root%\DOCUME~1\ADMINI~1
• %User Profile%\LOCALS~1
• %User Temp%\nsl2.tmp
• %Program Files%\PrivacyCode
• %Start Menu%\Programs\ÇÁ¶óÀ̹ö½ÃÄÚµå

(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_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
PrivacyCode = "%Program Files%\PrivacyCode\PrivacyCode.exe /run1"

Other System Modifications

This Trojan deletes the following files:

• %User Temp%\nsg1.tmp
• %User Temp%\nsl2.tmp
• %System Root%\DelUS.bat
• %Program Files%\PrivacyCode\ADDSCH~2.EXE
• %Program Files%\PrivacyCode\del.bat

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

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\App Paths\
PrivacyCode.exe

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
PrivacyCode

HKEY_LOCAL_MACHINE\Software\PrivacyCode

HKEY_LOCAL_MACHINE\Software\PrivacyCodePartner

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\intmedialab

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
PrivacyCode
DisplayName = "ÇÁ¶óÀ̹ö½ÃÄÚµå"

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

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
PrivacyCode
DisplayVersion = "1.000"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
pid = "cell"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
InstallDate = "20120206"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
Version = "1.000"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
UpdateVersion = "1.000"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCodePartner
install = "install_check"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\intmedialab
name = "PrivacyCode,"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\intmedialab
PrivacyCode = "2012020622"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
restart = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\PrivacyCode
Environment = "11111111111111"

Dropping Routine

This Trojan drops the following files:

• %User Temp%\nsisos.dll
• %User Temp%\nsl2.tmp\SelfDelete.dll
• \DelUS.bat
• %Program Files%\PrivacyCode\PrivacyCode.exe
• %Start Menu%\Programs\ÇÁ¶óÀ̹ö½ÃÄÚµå\ÇÁ¶óÀ̹ö½ÃÄÚµå.lnk
• %Program Files%\PrivacyCode\PrivacyCodeMon.exe
• %Program Files%\PrivacyCode\PrivacyCodecfg.exe
• %Program Files%\PrivacyCode\AddScheduler.exe
• %Program Files%\PrivacyCode\AddScheduler_.exe
• %Start Menu%\Programs\ÇÁ¶óÀ̹ö½ÃÄÚµå\ÇÁ¶óÀ̹ö½ÃÄÚµå Á¦°Å.lnk
• %Program Files%\PrivacyCode\uninst.exe
• %User Temp%\nsl2.tmp\System.dll
• %User Temp%\nsl2.tmp\DLLWebCount.dll
• %Program Files%\PrivacyCode\PrivacyCode.xml
• del.bat
• %Program Files%\PrivacyCode\PrivacyCode_uninst.xml
• %User Temp%\temp0.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.. %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.)

Other Details

This Trojan connects to the following possibly malicious URL:

• http://privacy{BLOCKED}ode.{BLOCKED}o.kr/app/{BLOCKED}ount.php?kind=install&pid=cell
• http://update.{BLOCKED}ycode.co.kr/partner/partner_info.ini
• http://update.{BLOCKED}ycode.co.kr/update_data.ini
• http://update.{BLOCKED}ycode.co.kr/version.ini

It deletes itself after execution.

This report is generated via an automated analysis system.