BKDR_DIOFOPI.A

This backdoor may be dropped by other malware. It may arrive using one or multiple arrival methods.

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

Arrival Details

This backdoor may be dropped by other malware.

It arrives via the following means:

• CVE-2012-4792

Installation

This backdoor adds the following mutexes to ensure that only one of its copies runs at any one time:

• &!#@&

Autostart Technique

This backdoor creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{785942B1-FDE7-447F-A9C2-694A721FA120}
stubpath = "{Dropped Component Path}\Common Files\DirectDB.exe"

Other System Modifications

This backdoor adds the following registry keys:

HKEY_LOCAL_MACHINE\SOFTWARE\STS

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Active Setup\Installed Components\{785942B1-FDE7-447F-A9C2-694A721FA120}

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\STS
nck = "{Values}"

Backdoor Routine

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

• {BLOCKED}e.yourtrap.com

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

Information Theft

This backdoor gathers the following data:

• Username
• Computername
• OS Version
• Volume and Drive Information
• System Locale
• Proxy Settings
• Autodial Settings

Other Details

Based on analysis of the codes, it has the following capabilities:

• Manage Files, Directories and Registries
• List Running Application (window title)
• Download and Execute Arbitrary files
• Load additional plugins
• List Running Modules (process)

It drops the following file(s)/component(s):

• For Windows 2000, Windows Server 2003, Windows XP
• %Program Files%\Common Files\DirectDB.exe - also detected as BKDR_DIOFOPI.A
• For Windows Vista / Windows 7
• %Application Data%\Common Files\DirectDB.exe - also detected as BKDR_DIOFOPI.A
• %User Temp%\shiape.exe - also detected as BKDR_DIOFOPI.A

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)