ADW_LOOPAD.A

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TypeAdware

Aliases: PAKE_Patch.UPX, PAK:UPX (Kaspersky); Generic Spy.e (NAI); Adware/LoopAd (Panda)

In the wild: No

Destructive: No

Language: English

Systems affected: Windows 95, 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:

Low

Reported detections:

Low

System  impact:

High

Information exposure:

Medium
 

Description:

This memory-resident adware is usually dropped by TROJ_DROPPER.BKR. When executed, it connects to certain Web sites that it uses to display pop-up advertisement.

Description created:  Oct 27, 2006



TECHNICAL DETAILS



Initial samples received on:  Aug 3, 2006

File type: PE

Memory resident: Yes  

File size: 21,504 Bytes

Related toTROJ_DROPPER.BKR

Details:

This adware is usually dropped by TROJ_DROPPER.BKR in the Windows system folder as ALG32.EXE.

Upon execution, it creates the following registry entry to ensure its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\Windows\
CurrentVersion\Run
rw service = "%System%\alg32.exe"

(Note: %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 connects to the following Web sites that it uses to display pop-up advertisement:

  • http://203.223.{BLOCKED}.15
  • http://www.{BLOCKED}-ads.net/rw/result.php?data2={random}

This adware affects systems running on Windows 95, 98, ME, NT, 2000, XP, and Server 2003.


Analysis by:  Marianne Margaret Layador



SOLUTION


Minimum scan engine version needed: 8.000

Download the latest scan engine

Spyware pattern version needed : 0.619.00

Pattern release date:  Mar 18, 2008


Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.

Solution:

Note: To fully remove all associated malware, perform the clean solution for TROJ_DROPPER.BKR.

Identifying the Grayware Program

Download the latest spyware pattern file and scan your computer. Note the path and file name of all files detected as ADW_LOOPAD.A.

Terminating the Grayware Program

This procedure terminates the running grayware process. You will need the name(s) of the file(s) detected earlier.

If the process you are looking for is not in the list displayed by Task Manager, proceed to the succeeding solution set.

  1. Open Windows Task Manager.
    On Windows 95, 98, and ME, press
    CTRL%20ALT%20DELETE
    On Windows NT, 2000, XP, and Server 2003, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the grayware file(s) detected earlier.
  3. Select one of the detected files, then press either the End Task or the End Process button, depending on the version of Windows on your computer.
  4. Do the same for all detected grayware files in the list of running processes.
  5. To check if the grayware process has been terminated, close Task Manager, and then open it again.
  6. Close Task Manager.

*NOTE: On computers running Windows 95, 98, and ME, Windows Task Manager may not show certain processes. You can use a third party process viewer such as Process Explorer to terminate the grayware process.

On computers running all Windows platforms, if the process you are looking for is not in the list displayed by Process Explorer, continue with the next solution procedure, noting additional instructions. If the grayware process is in the list displayed by either Task Manager or Process Explorer, but you are unable to terminate it, restart your computer in safe mode.

Editing the Registry

This grayware modifies the computer's registry. Users affected by this grayware may need to modify or delete specific registry keys or entries. For detailed information regarding registry editing, please refer to the following articles from Microsoft:

  1. HOW TO: Backup, Edit, and Restore the Registry in Windows 95, Windows 98, and Windows ME
  2. HOW TO: Backup, Edit, and Restore the Registry in Windows NT 4.0
  3. HOW TO: Backup, Edit, and Restore the Registry in Windows 2000
  4. HOW TO: Back Up, Edit, and Restore the Registry in Windows XP and Server 2003

Removing Autostart Entry from the Registry

Removing an autostart entry from the registry prevents the grayware from executing at startup.

If the registry entry below is not found, the grayware may not have executed as of detection. If so, proceed to the succeeding solution set.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>Windows>
    CurrentVersion>Run
  3. In the right panel, locate and delete the entry:
    rw service = "%System%\alg32.exe"

  4. (Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 95, 98 and ME, C:\WINNT\System32 on Windows NT and 2000, and C:\Windows\System32 on Windows XP and Server 2003.)
  5. Close Registry Editor.

Important Windows ME/XP Cleaning Instructions

Users running Windows ME and XP must disable System Restore to allow full scanning of infected computers.

Users running other Windows versions can proceed with the succeeding solution set(s).

Running Trend Micro Antivirus

If you are currently running in safe mode, please restart your computer normally before performing the following solution.

Download and unzip the latest spyware pattern file and scan your computer. Then, delete all files detected as ADW_LOOPAD.A.

Note: If the above manual removal instructions fail to eliminate this grayware, close all Internet Explorer windows, and perform the solution again.