Malware type: Trojan

Aliases: (Kaspersky), QLowZones-2 (McAfee), Trojan.LowZones (Symantec), TR/Dldr.Agent.MG.4 (Avira), Mal/EncPk-M (Sophos),

In the wild: Yes

Destructive: No

Language: English

Platform: Windows 95, 98, ME, NT, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:


Distribution potential:



Upon execution, this Trojan attempts to connect to certain Web sites.

It then downloads and executes certain files from the said sites. Some of these files are spyware applications.

For additional information about this threat, see:

Description created: Apr. 24, 2005 1:57:49 AM GMT -0800
Description updated: Apr. 24, 2005 2:04:07 AM GMT -0800


File type: PE

Memory resident:  Yes

Size of malware: 155,136 bytes

Initial samples received on: Apr 22, 2005

Compression type: Morphine


Upon execution, this Trojan attempts to connect to the following sites:


It then downloads and executes certain files from the said sites. Some of these files are spyware applications.

It creates the following registry entry to ensure its automatic execution at every Windows startup:

REGRUN = �{malware path and filename}�

Analysis By: Kerr Brynner C. Ang


Minimum scan engine version needed: 6.810

Pattern file needed: 2.599.02

Pattern release date: Apr 24, 2005

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.


Identifying the Malware Program

To remove this malware, first identify the malware program.

  1. Scan your system with your Trend Micro antivirus product.
  2. NOTE all files detected as TROJ_AGENT.RD.

Trend Micro customers need to download the latest pattern file before scanning their system. Other users can use Housecall, Trend Micro's online virus scanner.

Terminating the Malware Program

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

  1. Open Windows Task Manager.
    � On Windows 95, 98, and ME, press
    � On Windows NT, 2000, and XP, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the malware 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 system.
  4. Do the same for all detected malware files in the list of running processes.
  5. To check if the malware process has been terminated, close Task Manager, and then open it again.
  6. Close Task Manager.

*NOTE: On systems 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 malware process. Otherwise, continue with the next procedure, noting additional instructions.

Removing Autostart Entries from the Registry

Removing autostart entries from the registry prevents the malware from executing at startup.

  1. Open Registry Editor. Click Start>Run, type REGEDIT, then press Enter.
  2. In the left panel, double-click the following:
  3. In the right panel, locate and delete the entry:
    REGRUN = �{malware path and filename}�
  4. Close Registry Editor.

Additional Windows ME/XP Cleaning Instructions

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

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

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete files detected as TROJ_AGENT.RD. To do this, Trend Micro customers must download the latest pattern file and scan their system. Other Internet users can use HouseCall, Trend Micro's 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.