WORM_SPYBOT.AHQ

Malware type: Worm

Aliases: Backdoor.Win32.Rbot.mq (Kaspersky), W32/Sdbot.worm.gen.t (McAfee), W32.Spybot.Worm (Symantec), Worm/Rbot.299008.2 (Avira), W32/Rbot-BJP (Sophos),

In the wild: No

Language: English

Platform: Windows 95, 98, NT, ME, 2000, XP, and Server 2003

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This malware spreads through network shares by randomly generating IP addresses and attempting to drop a copy of itself to the target address' default shared folder.

Upon execution, it drops a copy of itself as GAMEMANAGER.EXE in the Windows system folder.

This program also has backdoor capabilities whereby it connects to a remote Internet Relay Chat (IRC) server and joins a specific channel. Here, the worm receives commands from a remote malicious user who may either download or execute files from the infected system.

For additional information about this threat, see:

Description created: Apr. 21, 2005 6:04:53 AM GMT -0800


TECHNICAL DETAILS


File type: EXE

Memory resident:  Yes

Size of malware: 303,104 Bytes

Initial samples received on: Apr 20, 2005

Payload 1: Compromises system security

Details:

Installation

Upon execution, this worm drops a copy of itself as GAMEMANAGER.EXE in the Windows system folder.

To enable itself to run in every startup, it creates the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Microsoft Games = "gamemanager.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunServices
Microsoft Games = "gamemanager.exe"

HKEY_CURRENT_USER\Software\Microsoft\OLE
Microsoft Games = "gamemanager.exe"

It also adds the following registry keys:

HKEY_CLASSES_ROOT\CLSID\{01B58B1C-8AA9-13D1-B2E4-0060975B8649}

HKEY_LOCAL_MACHINE\SOFTWARE\The Silicon Realms Toolworks

It also drops the file DELME.RAR in the root folder of the system drive, which contains some of its logs.

Network Propagation

This worm spreads through network shares by randomly generating IP addresses and attempting to drop a copy of itself to the target address' default shared folder.

Backdoor Capabilities

This worm connects to a remote Internet Relay Chat (IRC) server and joins a specific channel. Here, the worm receives commands from a remote malicious user who may either download or execute files from the infected system.

Other Details

This program infects Windows platforms 95, 98, NT, ME, 2000, XP, and Server 2003.

Analysis By: Daniel Manansala Biado


SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 2.591.03

Pattern release date: Apr 20, 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.

Solution:

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 WORM_SPYBOT.AHQ.

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
    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 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:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Windows>CurrentVersion>Run
  3. In the right panel, locate and delete the entry:
    Microsoft Games = "gamemanager.exe"
  4. Again, in the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>Windows>
    CurrentVersion>RunServices
  5. In the right panel, locate and delete the entry:
    Microsoft Games = "gamemanager.exe"
  6. Still, in the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>OLE
  7. In the right panel, locate and delete the entry:
    Microsoft Games = "gamemanager.exe"

Removing Keys from the Registry

  1. Still in the Registry Editor, in the left panel, double-click the following:
    HKEY_CLASSES_ROOT>CLSID>
  2. In the left panel, locate and delete the key:
    {01B58B1C-8AA9-13D1-B2E4-0060975B8649}
  3. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>
  4. In the left panel, locate and delete the key:
    The Silicon Realms Toolworks
  5. Close Registry Editor.

NOTE: If you were not able to terminate the malware process as described in the previous procedure, restart your system.

Deleting Malware File

  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:
    DELME.RAR
  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 Delete.

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 WORM_SPYBOT.AHQ. 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.




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