TROJ_FAKEAV.ZZW

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 file(s)/component(s):

• %Desktop%\Antivirus Security Pro support.url
• %Desktop%\Antivirus Security Pro.lnk
• %Start Menu%\Programs\Antivirus Security Pro\Antivirus Security Pro support.url
• %Start Menu%\Programs\Antivirus Security Pro\Antivirus Security Pro.lnk
• %All Users Profile%\Application Data\hVrs3n33\hVrs3n33.exe.manifest
• %All Users Profile%\Application Data\hVrs3n33\hVrs3n33.ico
• %All Users Profile%\Application Data\hVrs3n33\hVrs3n33NwixDxva.in
• %All Users Profile%\Application Data\hVrs3n33\hVrs3n33NwixDxva.lg
• %All Users Profile%\Application Data\hVrs3n33\serv.bat

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista and 7.. %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)

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

• %All Users Profile%\Application Data\hVrs3n33\hVrs3n33.exe

(Note: %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)

It creates the following folders:

• %Start Menu%\Programs\Antivirus Security Pro
• %All Users Profile%\Application Data\hVrs3n33
• %All Users Profile%\Application Data\hVrs3n33\DD1
• %All Users Profile%\Application Data\hVrs3n33\DD2
• %All Users Profile%\Application Data\hVrs3n33\DD3
• %All Users Profile%\Application Data\hVrs3n33\DD4

(Note: %Start Menu% is the current user's Start Menu folder, which is usually C:\Windows\Start Menu or C:\Documents and Settings\{User name}\Start Menu on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu on Windows Vista and 7.. %All Users Profile% is the All Users or Common profile folder, which is C:\Documents and Settings\All Users in Windows 2000, XP, and Server 2003, and C:\ProgramData in Windows Vista and 7.)

Other System Modifications

This Trojan adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Control Panel\don't load
wscui.cpl = "No"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows
AllowHTTPS = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Security
Trust Warning Level = "No Security"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyServer = "http=127.0.0.1:8888;https=127.0.0.1:8888;"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyOverride = "<-loopback>;"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
DisplayName = "Antivirus Security Pro"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
InstallLocation = "%All Users Profile%\Application Data\hVrs3n33"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
NoModify = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
NoRepair = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
UninstallString = ""%All Users Profile%\Application Data\hVrs3n33\hVrs3n33.exe" -uninstall"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Antivirus Security Pro
DisplayIcon = "%All Users Profile%\Application Data\hVrs3n33\hVrs3n33.ico,0"

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Download
CheckExeSignatures = "no"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Play_Background_Sounds = "no"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Main
Play_Animations = "no"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows
PopupMgr = "no"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\New Windows
PlaySound = "0"

(Note: The default value data of the said registry entry is "1".)

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Security
Sending_Security = "Low"

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

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Security
Safety Warning Level = "SucceedSilent"

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ProxyEnable = "1"

(Note: The default value data of the said registry entry is "0".)