WORM_SPYBOT.AIZ

Malware type: Worm

Aliases: Backdoor.Win32.IRCBot.amf (Kaspersky), W32.Spybot.Worm (Symantec), HEUR/Malware (Avira), Mal/IRCBot-A (Sophos),

In the wild: No

Destructive: No

Language: English

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

Encrypted: No

Overall risk rating:

Reported infections:

Damage potential:

High

Distribution potential:

High

Description: 

This worm spreads via network shares.

It generates IP addresses and spreads by attempting to drop a copy of itself in target addresses' default share. If the said share is password-protected, it uses gathered lists of user names and passwords as well as a hardcoded list of user names and passwords as its login credentials to gain access.

It connects to an IRC server and joins a specific channel, where it listens for commands from a remote malicious user. The said commands are executed locally on affected machines.

It performs a distributed denial of service attack against target sites using different flood methods.

For additional information about this threat, see:

Description created: May. 20, 2005 11:03:58 PM GMT -0800


TECHNICAL DETAILS


File type: PE

Memory resident:  Yes

Size of malware: 73, 617 Bytes

Initial samples received on: May 14, 2005

Details:

Installation and Autostart Techniques

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

It then creates the following autostart entry to ensure its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Datalog Application = "msdata.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\RunServices
Microsoft Datalog Application = "msdata.exe"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
Microsoft Datalog Application = "msdata.exe"

It also creates the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\System\CurrentControlSet\
Control\Lsa
Microsoft Datalog Application = "msdata.exe"

HKEY_CURRENT_USER\Software\
Microsoft\OLE
Microsoft Datalog Application = "msdata.exe"

HKEY_LOCAL_MACHINE\Software\
Microsoft\Ole
Microsoft Datalog Application = "msdata.exe"

HKEY_LOCAL_MACHINE\System\CurrentControlSet\
Control\Lsa
Microsoft Datalog Application = "msdata.exe"

Network Propagation

This worm generates IP addresses and spreads by attempting to drop a copy of itself in the following target addresses' default share:

  • IPC$

If the said shares are password-protected, it uses available lists of user names and passwords as well as the following list of hardcoded user names and passwords as its login credentials to gain access:

  • 12345
  • 123456
  • 1234567
  • 12345678
  • 123456789
  • 1234567890
  • access
  • accounting
  • accounts
  • admin
  • administrador
  • administrat
  • administrateur
  • administrator
  • admins
  • backup
  • bitch
  • blank
  • brian
  • changeme
  • chris
  • cisco
  • compaq
  • computer
  • control
  • database
  • databasepass
  • databasepassword
  • db1234
  • dbpass
  • dbpassword
  • default
  • domain
  • domainpass
  • domainpassword
  • exchange
  • george
  • guest
  • hello
  • homeuser
  • internet
  • intranet
  • katie
  • linux
  • login
  • loginpass
  • nokia
  • oeminstall
  • oemuser
  • office
  • oracle
  • orainstall
  • outlook
  • owner
  • pass1234
  • passwd
  • password
  • password1
  • peter
  • qwerty
  • server
  • siemens
  • sqlpassoainstall
  • staff
  • student
  • susan
  • system
  • teacher
  • technical
  • win2000
  • win2k
  • win98
  • windows
  • winnt
  • winpass
  • winxp
  • wwwadmin

Every successfully dropped copy of itself is remotely executed as a service.

Backdoor Capabilities

It connects to an Internet Relay Chat (IRC) server and joins a specific channel, where it listens for the following commands from a remote malicious user, thus gaining virtual control over the affected system:

  • Add and remove default network shares
  • Change IRC server and channel connected to
  • Download and execute files
  • Emulate a proxy server
  • Emulate an FTP server
  • Enable DCOM protocol
  • Flush DNS cache
  • Get various system information such as the following:
    • CPU speed
    • Free memory
    • Free disk space
    • Uptime
  • List and terminate services and processes
  • Log keystrokes
  • Redirect connections
  • Scan local area network for listening ports

Denial of Service Attack

This worm performs a denial of service attack against target sites using any of the following flood methods:

  • ICMP flood
  • SYN flood
  • TCP flood
  • UDP flood

Analysis By: Ohlord G. Gagto

Revision History:

First pattern file version: 5.280.11
First pattern file release date: May 16, 2008

SOLUTION


Minimum scan engine version needed: 6.810

Pattern file needed: 5.281.00

Pattern release date: May 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:

AUTOMATIC REMOVAL INSTRUCTIONS

MANUAL REMOVAL INSTRUCTIONS

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.AIZ.

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 98 and ME, press
    CTRL%20ALT%20DELETE
    � 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 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. If you were not able to terminate the malware process as described in the previous procedure, restart your system.

Editing the Registry

This malware modifies the system'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. About the Registry and How to Use Registry Editor
  2. HOW TO: Backup, Edit, and Restore the Registry in Windows 98 and Windows Me
  3. HOW TO: Backup, Edit, and Restore the Registry in Windows NT 4.0
  4. HOW TO: Back Up, Edit, and Restore the Registry in Windows XP
  5. HOW TO: Backup, Edit, and Restore the Registry in Windows 2000

Removing Autostart Entries from the Registry

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

If the registry entries below are 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:
    Microsoft Datalog Application = "msdata.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 Datalog Application = "msdata.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 Datalog Application = "msdata.exe"
  8. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    Windows>CurrentVersion>RunServices
  9. In the right panel, locate and delete the entry:
    Microsoft Datalog Application = "msdata.exe"

Removing Other Entries from the Registry

  1. Still in the Registry Editor, in the left panel, double-click the following:
    HKEY_CURRENT_USER>System>CurrentControlSet>
    Control>Lsa
  2. In the right panel, locate and delete the entry:
    Microsoft Datalog Application = "msdata.exe"
  3. In the left panel, double-click the following:
    HKEY_CURRENT_USER>Software>Microsoft>
    OLE
  4. In the right panel, locate and delete the entry:
    Microsoft Datalog Application = "msdata.exe"
  5. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>Software>Microsoft>
    Ole
  6. In the right panel, locate and delete the entry:
    Microsoft Datalog Application = "msdata.exe"
  7. In the left panel, double-click the following:
    HKEY_LOCAL_MACHINE>System>CurrentControlSet>
    Control>Lsa
  8. In the right panel, locate and delete the entry:
    Microsoft Datalog Application = "msdata.exe"
  9. 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 WORM_SPYBOT.AIZ. 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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