TROJ_FAKEAV.HGZ

This malware displays a legitimate-looking graphical user interface and fake infection alerts on the affected system. Should the user choose to purchase the fake application, his confidential data will be gathered and sent to malicious users.

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 displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

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 files:

• C:\Documents and Settings\All Users\Start Menu\E-Set 2011\E-Set Antivirus 2011.lnk
• C:\Documents and Settings\All Users\Start Menu\E-Set 2011\Uninstall.lnk
• %Desktop%\E-Set Antivirus 2011.lnk
• %User Profile%\Recent\E-Set Antivirus 2011.lnk

(Note: %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.. %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.)

It drops the following copies of itself into the affected system:

• %Program Files%\E-Set 2011\e-set.exe
• %System%\msiexecs.exe

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.. %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.)

It creates the following folders:

• C:\Documents and Settings\All Users\Start Menu\E-Set 2011
• %Program Files%\E-Set 2011

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)

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
E-Set 2011 = %Program Files%\E-Set 2011\e-set.exe

Other System Modifications

This Trojan adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Internet Explorer\ActiveX Compatibility\{D27CDB6E-AE6D-11CF-96B8-444553540000}
Compatibility Flags = 400

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Internet Settings\
5.0\User Agent\Post Platform
WinNT-A8I 18.05.2011 =

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
chrome.exe
Debugger = msiexecs.exe -sb

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
firefox.exe
Debugger = msiexecs.exe -sb

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
iexplore.exe
Debugger = msiexecs.exe -sb

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
opera.exe
Debugger = msiexecs.exe -sb

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\Image File Execution Options\
safari.exe
Debugger = msiexecs.exe -sb

It adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\{random}

Rogue Antivirus Routine

This Trojan displays fake alerts that warn users of infection. It also displays fake scanning results of the affected system. It then asks for users to purchase it once scanning is completed. If users decide to purchase the rogue product, users are directed to a certain website asking for sensitive information, such as credit card numbers.

NOTES:
It displays the following graphical user interface (GUI):

• http://{BLOCKED}e.{BLOCKED}stgoods.com

• Credit card information (i.e. card type, card number, expiration date, security code)
• Contact information (i.e. name, address, email, phone number)