Threat Descriptions

Trojan-Downloader:W32/Fakerean.gen!A

Classification

Category :

Malware

Type :

Trojan-Downloader

Platform :

W32

Aliases :

Trojan-Downloader:W32/Fakerean.gen!A, TrojanDownloader:Win32/FakeRean (Microsoft)

Summary

Trojan-Downloader:W32/Fakerean.gen!A is a generic detection for malware that downloads and installs rogue antivirus programs onto the computer. Once installed, the rogue antivirus program will display misleading or downright false warnings and/or scanning results, pressuring users into paying to "activate" the program, in order to remove/disinfect the supposed "threats". Even if the user pays for the "activation", the program may not function as intended.

Security programs use generic detections that look for broad patterns of code or behavior to identify similar programs or files. If you suspect the file was incorrectly detected, go to: Removal: Suspect a file is incorrectly detected (a False Positive)?.

Removal

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details

Installation

During installation, the malware creates the following file:

  • %windir%\ieocx.dll

Where %windir% represents the Windows Directory.The following modules are then loaded into other processes:

  • %windir%\ieocx.dll - Loaded into %windir%\system32\regsvr32.exe (PID: 1760)
  • %windir%\ieocx.dll - Loaded into %programfiles%\Internet Explorer\IEXPLORE.EXE (PID: 1120)

Note: The rogues downloaded may be detected as Trojan:W32/Fakerean by other antivirus vendors.

Registry Modifications

Sets these values:

  • HKCU\Control Panel\don't load scui.cpl = No by %cwd%\sample.exe (PID:1752)
  • HKCU\Control Panel\don't load wscui.cpl = No by %cwd%\sample.exe (PID:1752)
  • HKLM\SOFTWARE\Microsoft\Security Center AntiVirusDisableNotify = 1 by %cwd%\sample.exe (PID:1752) [Alerts for no Antivirus Disabled]
  • HKLM\SOFTWARE\Microsoft\Security Center UpdatesDisableNotify = 1 by %cwd%\sample.exe (PID:1752) [Alerts for no Windows-Updates Disabled]
  • HKLM\SOFTWARE\Microsoft\Security Center FirewallDisableNotify = 1 by %cwd%\sample.exe (PID:1752) [Alerts for no Firewall Disabled]
  • HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{39fc2065-c9c7-49cd-8942-44cc2dedc844} NoExplorer = 7340152 by %windir%\system32\regsvr32.exe (PID:1760) [Launchpoint: BHO]
  • HKCU\Software\WinPC Defender Minimize = 0 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender Start = 1 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender Scan = 1 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender id = 232345 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender UpdateDate = 31-03-2009 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender fstart = 1 by %cwd%\sample.exe (PID:1752)
  • HKCU\Software\WinPC Defender site = http://billingpayment.net/pp/?id= by %cwd%\sample.exe (PID:1752)
  • HKLM\System\CurrentControlSet\Services\BITS\Control ActiveService = BITS by %windir%\system32\services.exe (PID:604)
  • HKLM\System\CurrentControlSet\Services\BITS Start = 12 by %windir%\system32\services.exe (PID:604)
  • HKLM\Software\Classes\CLSID\{95dd14b6-a2ed-11da-9241-806d6172696f}\\{95dd14b9-a2ed-11da-9241-806d6172696f}\\{95dd14b9-a2ed-11da-9241-806d6172696f}\ BaseClass = Drive by %cwd%\sample.exe (PID:1752)
  • HKLM\Software\Classes\batfile\MUICache\ C:\Documents and Settings\user\Application Data\asd.bat = asd by %cwd%\sample.exe (PID:1752)
  • HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\{39FC2065-C9C7-49CD-8942-44CC2DEDC844}\iexplore Type = 655360 by %programfiles%\Internet Explorer\IEXPLORE.EXE (PID:1120)
  • HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\{39FC2065-C9C7-49CD-8942-44CC2DEDC844}\iexplore Count = 12 by %programfiles%\Internet Explorer\IEXPLORE.EXE (PID:1120)
  • HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\{39FC2065-C9C7-49CD-8942-44CC2DEDC844}\iexplore Time = by %programfiles%\Internet Explorer\IEXPLORE.EXE (PID:1120)