Backdoor.Ratenjay.D

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Discovered: January 24, 2015
Updated: January 26, 2015 10:09:48 PM
Type: Trojan, Virus
Infection Length: Varies
Systems Affected: Windows

Backdoor.Ratenjay.D is a is a Trojan horse that opens a back door on the compromised computer and steals information. It spreads through removable drives and may download additional files.

Antivirus Protection Dates

  • Initial Rapid Release version January 24, 2015 revision 017
  • Latest Rapid Release version September 21, 2019 revision 018
  • Initial Daily Certified version January 25, 2015 revision 002
  • Latest Daily Certified version August 14, 2019 revision 003
  • Initial Weekly Certified release date January 28, 2015

Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.


Technical Description

The Trojan horse may arrive on the compromised computer after being spread through a removable drive.

When the Trojan is executed, it creates the following files:

  • [INSTALL DIRECTORY]\System\smss-DoOoMs.vbs
  • [INSTALL DIRECTORY]\smss-DoOoM-privacy\smss-DoOoMs.vbe
  • [INSTALL DIRECTORY]\smss-DoOoM-service\smss-DoOoMs.vbe
  • %RemovableDrive%\smss-DoOoMs.vbe
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs\Startup\smss-DoOoM.lnk
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs\Startup\smss-DoOoMs.lnk
  • %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs\Startup\smss-DoOoM.url
  • [INSTALL DIRECTORY]\Media Player\smss-DoOoMp.lnk
  • [INSTALL DIRECTORY]\Media Player\smss-DoOoM.lnk
  • %RemovableDrive%\Videos
  • %RemovableDrive%\Pictures
  • %RemovableDrive%\Movies
  • %RemovableDrive%\Games
  • %RemovableDrive%\DCIM
  • %RemovableDrive%\[FILE NAME].lnk
  • %RemovableDrive%\[SUB FOLDER].lnk

Note: [INSTALL DIRECTORY] may be any of the following:
  • %Temp%
  • %SystemDrive%\Documents and Settings\All Users\Application Data
  • %UserProfile%

Note: [FILE NAME] may be any file present on the removable drive.

Note: [SUB FOLDER] may be any folder under the root of the removable drive.

The Trojan creates the following registry key to indicate a USB infection:
  • HKEY_CURRENT_USER\Console\NiceX" = ["True"|"False"]

The Trojan creates the following registry key to mark the date of installation:
  • HKEY_CURRENT_USER\Console\DateX" = [DATE]

The Trojan creates the following registry entries:
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\smss-DoOoMs = [INSTALL DIRECTORY]\Media Player\smss-DoOoMp.lnk
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\smss-DoOoM = [INSTALL DIRECTORY]\Media Player\smss-DoOoM.lnk

The Trojan modifies the following registry keys:
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\hlpfile\shell\open\command = "%SystemDrive%\System32\winhlp32.exe, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{871C5380-42A0-1069-A2EA-08002B30309D}\shell\OpenHomePage\Command = "%ProgramFiles%\Internet Explorer\iexplore.exe, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs"
  • HKU\S-1-5-21-1390067357-1275210071-839522115-1004\Software\Microsoft\Windows NT\CurrentVersion\Windows\load = "%SystemDrive%\system32\smss.exe, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\inffile\shell\open\command = "%SystemDrive%\System32\NOTEPAD.EXE, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs"
  • HKEY_LOCAL_MACHINE\SOFTWARE\Classes\regfile\shell\open\command = "%SystemDrive%\regedit.EXE, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\Windows\system32\userinit.exe, wscript.exe //B [INSTALL DIRECTORY]\System\smss_DoOoMs.vbs

The Trojan modifies the following registry entry so hidden files are no longer shown in Explorer:
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Hidden = 0

The Trojan creates a high priority task with the following command when a user logs on to the compromised computer:
  • schtasks /create /sc ONLOGON /RL HIGHEST /tn smss_DoOoM.vbe /tr [installdir]\System\smss_DoOoMs.vbs

The Trojan opens a back door, and connects to a remote location.

Note: The remote location is chosen by the attacker and can be an IP address or URL of their choice. The usual port for the remote location is 4000, but it can vary.

The Trojan sends the following command to the remote location:
  • ?mew

The Trojan may steal the following information from the compromised computer by using the User-Agent HTTP header:
  • Active window name
  • First non-empty volume serial number
  • Computer name
  • User name
  • Windows version
  • Country code
  • Trojan version
  • Presence of USB drives
  • RAM
  • List of installed antivirus products
  • List of installed firewalls
  • CPU model
  • GPU model

The Trojan may stop the following antivirus products:
  • SpyTheSpy.exe
  • TiGeR-Firewall.exe
  • bavtray.exe

The Trojan may perform the following actions:
  • Download a file to %Temp%\[FILE NAME][EXTENSION], run it, and send ?msg10 to the remote location
  • Shut down the computer in an allotted time and send ?msg12 to the remote location
  • Shut down the computer immediately and send ?msg15 to the remote location
  • Reboot the computer in an allotted time and send ?msg13 to the remote location
  • Reboot the computer immediately and send ?msg16 to the remote location
  • Log off the current profile in an allotted time and send ?msg14 to the remote location
  • Log off the current profile and send ?msg17 to the remote location
  • Open [http://]www.livequran.org[REMOVED] in the default browser
  • Open an information dialog with the logged on user titled "Microsoft"
  • Drops a transferred file to %Temp%\[FILE NAME][EXTENSION] and executes it
  • Execute code contained in HTTP responses
  • Execute commands on the local cmd.exe and send ?msg11 to the remote location
  • Create %SystemDrive%\Documents and Settings\All Users\Start Menu\Programs\Startup\Service.vbe to mine bitcoins after every reboot
  • Uninstall itself
  • Delete itself if a virtual machine is detected

The Trojan may connect to one of the following URLs:
  • [http://]uploadkon.ir/fl/dd/52[REMOVED]
  • [http://]www.mastcheck.com/uploads/14186039[REMOVED]
  • [http://]www.mastcheck.com/uploads/14186036[REMOVED]
  • [http://]www.mastcheck.com/uploads/14186040[REMOVED]

The Trojan may download the following files from the previously mentioned URLS:
  • %Temp%\Macromedia\libcurl1-4.dll
  • %Temp%\Macromedia\libwinpthread-1.dll
  • %Temp%\Macromedia\minerd.exe.
  • %Temp%\Macromedia\zlib1.dll

The Trojan may mine bitcoins to the following location:
  • stratum+tcp://66.55.92.73:800

Recommendations

Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.


Removal

You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan . If that does not resolve the problem you can try one of the options available below.



FOR NORTON USERS
If you are a Norton product user, we recommend you try the following resources to remove this risk.


Removal Tool


If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.


FOR BUSINESS USERS
If you are a Symantec business product user, we recommend you try the following resources to remove this risk.


Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.


Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .


How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network



MANUAL REMOVAL
The following instructions pertain to all current Symantec antivirus products.


1. Performing a full system scan
How to run a full system scan using your Symantec product


2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.

Writeup By: Héctor Navarro Martín and Roberto Sponchioni