Spyware.Apropos.C

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Updated: February 13, 2007 11:46:57 AM
Type: Spyware
Version: n/a
Publisher: n/a
Risk Impact: High

Behavior


Spyware.Apropos.C is a spyware that installs several programs that links to Web sites and sends information. It also uses rootkit techniques to hide its presence on compromised computers.

Symptoms


One or more files is detected as Spyware.Apropos.C

Transmission


It is installed via an ActiveX control or using a custom downloader or installer program.

Antivirus Protection Dates

  • Initial Rapid Release version October 02, 2014 revision 022
  • Latest Rapid Release version June 10, 2017 revision 019
  • Initial Daily Certified version October 20, 2005
  • Latest Daily Certified version June 11, 2017 revision 001
  • Initial Weekly Certified release date October 26, 2005

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.

Updated: February 13, 2007 11:46:57 AM
Type: Spyware
Version: n/a
Publisher: n/a
Risk Impact: High


When Spyware.Apropos.C runs, it does the following:

  1. May create some of the following files:

    • %Temp%\install_ct.exe
    • %Windir%\ptJ5Z
    • %ProgramFiles%\[RANDOM NAME]\ace.dll
    • %ProgramFiles%\[RANDOM NAME]\WinGenerics.dll
    • %ProgramFiles%\[RANDOM NAME]\data.bin
    • %ProgramFiles%\[RANDOM NAME]\AI_[INSTALL DATE].log
    • %ProgramFiles%\[RANDOM NAME]\Cache
    • %ProgramFiles%\[RANDOM NAME]\[RANDOM NAME].exe
    • %ProgramFiles%\[RANDOM NAME]\[RANDOM NAME].exe
    • %System%\[RANDOM NAME].dll
    • %System%\[RANDOM NAME].exe
    • %System%\drivers\[RANDOM NAME].sys


      Notes:
      • %Windir% is a variable that refers to the Windows installation folder. By default, this is C:\Windows or C:\Winnt.
      • %Temp% is a variable that refers to the Windows temporary folder. By default, this is C:\Windows\TEMP (Windows 95/98/Me/XP) or C:\WINNT\Temp (Windows NT/2000).
      • %System% is a variable that refers to the System folder. By default, this is C:\Windows\System (Windows 95/98/Me), C:\Winnt\System32 (Windows NT/2000), or C:\Windows\System32 (Windows XP).
      • %ProgramFiles% is a variable that refers to the program files folder. By default, this is C:\Program Files.
      • [RANDOM NAME] is a variable that is a randomly generated folder or file name of 8 alpanumeric symbols. Spyware.Apropos.C tries to generate its random names by mixing random letters with legitimate filenames gathered from installed applications, in order to look like a legitimate program
      • [INSTALL DATE] is variable that refers to the installadtion date of Spyware.Apropos.C on the system

  2. Add the values:

    "AutoUpdater" = "%System%\[RANDOM NAME].exe"
    "ClientName" = "%ProgramFiles%\[RANDOM NAME]\[RANDOM NAME].exe"
    "Device" = "\\.\[RANDOM NAME]"
    "DriverName" = "[RANDOM NAME]"
    "DriverPath" = "%System%\drivers\[RANDOM NAME].sys"
    "HDll" = "%System%\[RANDOM NAME].dll"
    "HideUninstallerName" = "%System%\[RANDOM NAME].exe"
    "InstallationId" = "[RANDOM CLSID]"
    "LegalNote" = "[http://]adchannell.contextplus.net/[REMOVED]/nonbranded.html"
    "PageFiltering" = 0x02
    "PartnerId" = "WB.CP"
    "ServerAddress" = "adchannel.contextplus.net"
    "Version" = "2.0.106"

    to the registry key:

    HKEY_LOCAL_MACHINE\SOFTWARE\[RANDOM NAME]

  3. Adds the value:

    "Auto" = [AUTOSTART LIST]
    "Debg" = [BINARY VALUE]
    "Device" = [BINARY VALUE]
    "ErrorControl" = "1"
    "File" = [BINARY VALUE]
    "ImagePath" = \\??\%System%\drivers\[RANDOM NAME].sys
    "Keys" = [BINARY VALUE]
    "Start" = "1"
    "Type" = "1
    "

    to the registry key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[RANDOM NAME]

    so that Spyware.Apropos.C runs every time Windows starts.

    Note: [AUTOSTART LIST] is a variable that refers to a list of executable files that Spyware.Apropos.C system driver will run when the compromised computer is restarted.

  4. Uses rootkit capabilities to avoid detection and hide its running processes. It hides the installed folder inside %ProgramFiles% and the system driver is dropped into %System%\drivers directory.

  5. Downloads and displays advertisements.

  6. Monitors network activity and periodically contacts a remote server for instructions. Depending on the reply, it can:
    • Download and execute a program
    • Reconfigure itself to contact a different remote server
    • Send information to the remote server


Updated: February 13, 2007 11:46:57 AM
Type: Spyware
Version: n/a
Publisher: n/a
Risk Impact: High


Manual Removal
The following instructions pertain to all Symantec antivirus products that support Security Risk detection.

  1. Update the definitions.
  2. Restart the computer in Safe mode.
  3. Run a full system scan.
  4. Delete the value that was added to the registry.
For specific details on each of these steps, read the following instructions.

1. To update the definitions
To obtain the most recent definitions, start your Symantec program and run LiveUpdate.

2. To restart the computer in Safe mode
Shut down the computer, and turn off the power. Wait for at least 30 seconds, and then restart the computer in Safe mode. For instructions, read "How to start the computer in Safe Mode ."

3. To run the scan
  1. Start your Symantec antivirus program, and then run a full system scan.

    Note: If you ran the Add/Remove programs applet as described in the previous section, all the files may have been removed, and thus none of them will be detected.
  2. If any files are detected as Spyware.Apropos and depending on which software version you are using, you may see one or more of the following options:

    Note: This applies only to versions of Norton AntiVirus that support Security Risk detection. If you are running a version of Symantec AntiVirus Corporate Edition that supports Security Risk detection, and Security Risk detection has been enabled, you will only see a message box that gives the results of the scan. If you have questions in this situation, contact your network administrator.
    • Exclude (Not recommended): If you click this button, it will set the threat so that it is no longer detectable. That is, the antivirus program will keep the security risk on your computer and will no longer detect it to remove from your computer.

    • Ignore or Skip: This option tells the scanner to ignore the threat for this scan only. It will be detected again the next time that you run a scan.

    • Cancel: This option is new to Norton Antivirus 2005. It is used when Norton Antivirus 2005 has determined that it cannot delete a security risk. This Cancel option tells the scanner to ignore the threat for this scan only, and thus, the threat will be detected again the next time that you run a scan.

      To actually delete the security risk:
      • Click its file name (under the Filename column).
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer.

    • Delete: This option will attempt to delete the detected files. In some cases, the scanner will not be able to do this.
      • If you see a message, "Delete Failed" (or similar message), manually delete the file.
      • Click the file name of the threat that is under the Filename column.
      • In the Item Information box that displays, write down the full path and file name.
      • Then use Windows Explorer to locate and delete the file.

        If Windows reports that it cannot delete the file, this indicates that the file is in use. In this situation, complete the rest of the instructions on this page, restart the computer in Safe mode, and then delete the file using Windows Explorer.

4. To delete the value from the registry

Important:
Symantec strongly recommends that you back up the registry before making any changes to it. Incorrect changes to the registry can result in permanent data loss or corrupted files. Modify the specified keys only. Read the document, "How to make a backup of the Windows registry ," for instructions.
  1. Click Start > Run.
  2. Type regedit

    Then click OK.

  3. Navigate and delete the following key:

    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\[SPYWARE SERVICE NAME]

    Note: [SPYWARE SERVICE NAME] is a variable that refers to the value stored in the subkey HKEY_LOCAL_MACHINE\SOFTWARE\[RANDOM NAME]\DriverName

  4. Navigate to the key:

    HKEY_LOCAL_MACHINE\SOFTWARE\[RANDOM NAME]

  5. In the right pane, delete the following values if present:

    "AutoUpdater" = "%System%\[RANDOM NAME].exe"
    "ClientName" = "%ProgramFiles%\[RANDOM NAME]\[RANDOM NAME].exe"
    "Device" = "\\.\[RANDOM NAME]"
    "DriverName" = "[RANDOM NAME]"
    "DriverPath" = "%System%\drivers\[RANDOM NAME].sys"
    "HDll" = "%System%\[RANDOM NAME].dll"
    "HideUninstallerName" = "%System%\[RANDOM NAME].exe"
    "InstallationId" = "[RANDOM CLSID]"
    "LegalNote" = "[http://]adchannell.contextplus.net/[REMOVED]/nonbranded.html"
    "PageFiltering" = 0x02
    "PartnerId" = "WB.CP"
    "ServerAddress" = "adchannel.contextplus.net"
    "Version" = "2.0.106"

  6. Exit the Registry Editor.