WORM_SDBOT.MQ

Malware type: Worm

In the wild: Yes

Destructive: No

Language: English

Platform: Windows NT, 2000, XP

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This memory-resident worm propagates through Internet Relay Chat (IRC) and network shares.

It connects to port 6667 and joins a specific channel where it listens for several malicious commands issued by a remote user. It also steals CD keys of certain game applications.

It scans a network for weak passwords and attempts to drop a copy of itself on a vulnerable machine. It uses a list of common user names and weak passwords, which are hardcoded in its body, to access the system.

This malware is written and compiled using Visual C%20%20, a high-level programming language.

It runs on Windows NT, 2000, and XP.

For additional information about this threat, see:

Description created: Apr. 10, 2004 5:32:37 AM GMT -0800
Description updated: Apr. 10, 2004 5:32:34 AM GMT -0800


TECHNICAL DETAILS


Size of malware: 121,344 Bytes

Initial samples received on: Apr 10, 2004

Payload 1: Compromises system security

Trigger condition 1: Upon execution

Payload 2: Steals CD game keys

Trigger condition 1: Upon execution

Details:

Installation and Autostart Techniques

Upon execution, this memory-resident worm drops the file MSCONFIG32.EXE in the Windows system folder.

To enable its automatic execution at every system startup, it creates the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Configuration = "msconfig32.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Configuration = "msconfig32.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
Microsoft Configuration = "msconfig32.exe"

Backdoor Capabilities

This malware connects to port 6667 and joins a specific channel where it listens for the following commands issued by a remote user:

Network Propagation

This worm also propagates via network shares.

It scans a network for weak passwords and attempts to drop a copy of itself on a vulnerable machine. It uses a list of common user names and weak passwords, which are hardcoded in its body, to gain access to the system.

The hardcoded passwords are as follows:

Once it has successfully logged on, it drops and executes a copy of itself in the following paths:

  • <Network name of the machine>\c$\Windows\System32
  • <Network name of the machine>\c$\WINNT\System32
  • <Network name of the machine>\Admin$\System32
  • <Network name of the machine>\ipc$

(Note: Since the target Administrative folders or locations commonly exist only under Windows NT-based platforms, the propagation routine is available only to Windows NT, 2000, XP, and 2003.)

Information Theft

This malware also steals CD keys of the following game applications:




Analysis by: Mylene Enriquez


SOLUTION


Minimum scan engine version needed: 6.500

Pattern file needed: 1.854.30

Pattern release date: Apr 10, 2004


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

Before proceeding to remove this malware, first identify the malware program.

Scan your system with Trend Micro antivirus and NOTE all files detected as WORM_SDBOT.MQ. 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 free online virus scanner.

Terminating the Malware Program

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

  1. Open Windows Task Manager.
    On Windows 95/98/ME systems, press
    CTRL%20ALT%20DELETE
    On Windows NT/2000/XP systems, press
    CTRL%20SHIFT%20ESC, then click the Processes tab.
  2. In the list of running programs*, locate the malware file or files 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/ME, Task Manager may not show certain processes. You may use a third party process viewer 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 during startup.

  1. Open Registry Editor. To do this, 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 Configuration = "msconfig32.exe"
  4. 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 Configuration = "msconfig32.exe"
  6. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>Run
  7. In the right panel, locate and delete the entry:
    Microsoft Configuration = "msconfig32.exe"
  8. Close Registry Editor.
NOTE: If you were not able to terminate the malware process from memory as described in the previous procedure, restart your system.

Additional Windows ME/XP Cleaning Instructions

Running Trend Micro Antivirus

Scan your system with Trend Micro antivirus and delete all files detected as WORM_SDBOT.MQ. 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 free 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.