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TROJ_KEENVAL.AL

Malware type: Dropper

Aliases: Trojan-Downloader.Win32.Keenval (Kaspersky), Adware-KeenValue (McAfee), Adware.Keenval (Symantec), TR/Dldr.Keenval.B.2 (Avira),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 98, ME, NT, 2000, XP, Server 2003

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

Medium

Distribution potential:

Low

Description: 

This Trojan may be downloaded from remote sites or dropped by other malware. It creates a folder as part of its installation routine.

This Trojan accesses Web sites to download possibly malicious files or an updated copy of itself.

It drops files detected by Trend Micro as SPYW_KEENVAL.A. As a result, routines of the dropped files may be exhibited on the system.

For additional information about this threat, see:

Description created: Jun. 7, 2007 12:32:58 AM GMT -0800


Minimum scan engine version needed: 8.000


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 solutions for the following:

Editing the Registry

This malware modifies the computer's registry. Users affected by this malware 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 autostart entries from the registry prevents the malware from executing at startup.

If the registry entry below is not found, the malware 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_LOCAL_MACHINE>SOFTWARE>Microsoft>
    Windows>CurrentVersion>Run
  3. In the right panel, locate and delete the entry:
    updater = "%Program Files%\Common files\updater\wupdater.exe"
    (Note: %Program Files% is the default Program Files folder, usually C:\Program Files.)
  4. Close Registry Editor.

Removing Added Registry Entries

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE\SOFTWARE\updater
  3. In the right panel, locate and delete the entries:
    EXEName = "wupdater.exe"
    Install_Dir = "%Program Files%\Common files\updater"
  4. Close Registry Editor.

Deleting the Malware Folder(s)

  1. Right-click Start then click Search... or Find..., depending on the version of Windows you are running.
  2. In the Named input box, type:
    • %Program Files%\Common Files\updater
  3. In the Look In drop-down list, select the drive that contains Windows, then press Enter.
  4. Once located, select the file then press SHIFT+DELETE.

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.

Scan your computer with Trend Micro antivirus and delete files detected as TROJ_KEENVAL.AL. To do this, Trend Micro customers must download the latest virus pattern file and scan their computer. Other Internet users can use HouseCall, the Trend Micro online virus scanner.




Trend Micro offers best-of-breed antivirus and content-security solutions for your corporate network, small and medium business, mobile device or home PC.