BKDR_MORIX.A

This backdoor may arrive bundled with malware packages as a malware component. It may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites.

It connects to a website to send and receive information. However, as of this writing, the said sites are inaccessible.

It gathers certain information on the affected computer.

Arrival Details

This backdoor may arrive bundled with malware packages as a malware component.

It may be dropped by other malware.

It may be unknowingly downloaded by a user while visiting malicious websites.

Autostart Technique

This backdoor modifies the following registry entries to ensure it automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\AppMgmt\Parameters
ServiceDll = "C:\Progra~1\%Program Files%\Wdcp.dll"

(Note: The default value data of the said registry entry is %SystemRoot%\System32\appmgmts.dll.)

Other System Modifications

This backdoor modifies the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\AppMgmt
Start = 2

(Note: The default value data of the said registry entry is 3.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\AppMgmt
Type = 120

(Note: The default value data of the said registry entry is 20.)

Backdoor Routine

This backdoor connects to the following websites to send and receive information:

• {BLOCKED}123.3322.org:8080

However, as of this writing, the said sites are inaccessible.

Information Theft

This backdoor gathers the following information on the affected computer:

• Computer name
• Processor speed (in MHz)
• Operating system version
• Number of processors
• Number of days since the system startup
• Hard disk geometry
• Total amount of memory (in MB)

NOTES:
It checks the following anti-malware related processes and adds them to the gathered information:

• 360tray.exe
• avp.exe
• KvMonXP.exe
• RavMonD.exe
• 360sd.exe
• Mcshield.exe
• egui.exe
• kxetray.exe
• knsdtray.exe
• TMBMSRV.exe
• avcenter.exe
• ashDisp.exe

• my.exe
• dp.exe
• mdm365.exe
• dnf.exe
• xy2.exe
• xy3.exe
• QQhxgame.exe
• wow.exe
• tw2.exe

It has keylogging capabilities. The logged keystrokes are added to the gathered information.

It sends all the information it gathers to the following remote site at 5:00 to 5:09 UTC and 13:00 to 13:09 UTC:

• {BLOCKED}h.{BLOCKED}p.net:80

However, as of this writing, the said site is inaccessible.

It terminates the process 360tray.exe if the operating system is Windows XP and the process logonui.exe is running.

It deletes itself if the process DSMain.exe is running.

It creates the following registry entries to enable automatic execution of its malware component, 362.VBS, detected by Trend Micro as VBS_ARUN.ASM, at every system startup if the operating system is Windows 2000:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
{random string}="file:c:\windows\362.VBS"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
{random string}="rundll32.exe C:\Progra~1\%%Progr~1\Wdcp.dll main"

It downloads the file from http://www.{BLOCKED}011.com/OOO.eXe if the process my.exe is executing and saves it to {malware path}\crss.exe. It then executes the downloaded file. However, as of this writing, the said site is inaccessible.

It downloads the file from the URL specified in the registry value DN in the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Winsock. It saves the downloaded file as {malware path}\CTFM0N.EXE, then executes it.

It monitors its malware file at %Program Files%\Wdcp.dll. If the malware file %Program Files%\Wdcp.dll is deleted, it drops a new copy of it.

The malware contains errors in its code. This causes the malware not to perform some of its routines.