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Win32/Spy.Ursnif.A. infection and file infected with multiple infiltrations


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#1 Corvuso

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Posted 22 June 2011 - 11:14 PM

Hello

After running NOD32 i have some issues with the following things;

C:\i386\TERMSRV.DL_ »CAB »termsrv.dll - Win32/Spy.Ursnif.A virus
C:\Users\Olivier\Application Data\Sun\Java\Deployment\cache\6.0\55\9e8a8b7-555b520d »ZIP »workpack/editor.class - Java/Agent.AB trojan
C:\Users\Olivier\Application Data\Sun\Java\Deployment\cache\6.0\55\9e8a8b7-555b520d »ZIP »xmleditor/peers.class - Java/TrojanDownloader.OpenStream.NAY trojan

And since some times, my computer is much slower

Thanks
Corvuso

Attached Files


Edited by Orange Blossom, 22 June 2011 - 11:44 PM.
Moved from XP to AII. ~ OB


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#2 boopme

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Posted 27 June 2011 - 06:19 PM

Hello. the Win32/Spy.Ursnif.A is a trojan that steals sensitive information.
I would quarantine all. They can no longer harm you from there.
The following information is collected:
operating system version

computer IP address

default Internet browser


Did it create a new User Account with the username:
l%variable3%

You may not see it.

The following Registry entry is set:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\
CurrentVersion\Winlogon\SpecialAccounts\UserList]
"l%variable3%" = ""

This way the trojan hides the created user account in listings of all accounts.


The other 2 items:
When a browser runs an applet, the Java Runtime Environment (JRE) stores the downloaded files into its cache folder (C:\Documents and Settings\username\Application Data\Sun\Java\Deployment\cache) for quick execution later and better performance. Malicious applets are also stored in the Java cache directory and your anti-virus may detect them and provide alerts. For more specific information about Java exploits, please refer to Virus found in the Java cache directory.

Notification of these files as a threat does not always mean that a machine has been infected; it indicates that a program included the viral class file but this does not mean that it used the malicious functionality. As a precaution, I recommend clearing the entire cache to ensure everything is cleaned out:

Lets also get another log.

Next run MBAM (MalwareBytes):

Please download Malwarebytes Anti-Malware and save it to your desktop.
Download Link 1
Download Link 2MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you. Temporarily disable such programs or permit them to allow the changes.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
    For instructions with screenshots, please refer to the How to use Malwarebytes' Anti-Malware Guide.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself. Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the definition updates, manually download them from here and just double-click on mbam-rules.exe to install.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply. Be sure to post the complete log to include the top portion which shows MBAM's database version and your operating system.
  • Exit MBAM when done.
Note: If MBAM encounters a file that is difficult to remove, you will be asked to reboot your computer so MBAM can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware.

Troubleshoot Malwarebytes' Anti-Malware
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#3 Corvuso

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Posted 27 June 2011 - 09:15 PM

Hello boopme

I am using window xp sp3 and mozilla firefox as default internet browser


I can't see a new user account with the username:
l%variable3%

and i can't see
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\
CurrentVersion\Winlogon\SpecialAccounts\UserList]
"l%variable3%" = ""
in the registry

For the two other items, i have followed your instruction

Here is the MBAM's log:

Malwarebytes' Anti-Malware 1.50.1.1100
www.malwarebytes.org

Version de la base de données: 6964

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

2011-06-27 21:51:21
mbam-log-2011-06-27 (21-51-21).txt

Type d'examen: Examen rapide
Elément(s) analysé(s): 194364
Temps écoulé: 3 minute(s), 14 seconde(s)

Processus mémoire infecté(s): 0
Module(s) mémoire infecté(s): 0
Clé(s) du Registre infectée(s): 0
Valeur(s) du Registre infectée(s): 2
Elément(s) de données du Registre infecté(s): 1
Dossier(s) infecté(s): 0
Fichier(s) infecté(s): 0

Processus mémoire infecté(s):
(Aucun élément nuisible détecté)

Module(s) mémoire infecté(s):
(Aucun élément nuisible détecté)

Clé(s) du Registre infectée(s):
(Aucun élément nuisible détecté)

Valeur(s) du Registre infectée(s):
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update (Backdoor.IRCBot) -> Value: Windows Update -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows SP Update (Trojan.Agent) -> Value: Windows SP Update -> Quarantined and deleted successfully.

Elément(s) de données du Registre infecté(s):
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Start_ShowHelp (PUM.Hijack.StartMenu) -> Bad: (0) Good: (1) -> Quarantined and deleted successfully.

Dossier(s) infecté(s):
(Aucun élément nuisible détecté)

Fichier(s) infecté(s):
(Aucun élément nuisible détecté)

Does running a complete scan with MBAM could be usefull or dangerous ?

Thanks a lot for the help!
Corvuso

#4 boopme

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Posted 27 June 2011 - 09:36 PM

I usually ask for an Update and FULL scan next. Your log contains this
HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Update (Backdoor.IRCBot)

This is important and I feel Obligated to state this ,,, we found Rootkits, backdoor Trojans, Botnets, and IRC Bots are very dangerous because they compromise system integrity by making changes that allow it to by used by the attacker for malicious purposes. Rootkits are used by Trojans to conceal its presence (hide from view) in order to prevent detection of an attacker's software and make removal more difficult. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. They can disable your anti-virus and security tools to prevent detection and removal. Remote attackers use backdoors as a means of accessing and taking control of a computer that bypasses security mechanisms. This type of exploit allows them to steal sensitive information like passwords, personal and financial data which is send back to the hacker. To learn more about these types of infections, you can refer to:

What danger is presented by rootkits?
Rootkits and how to combat them
r00tkit Analysis: What Is A Rootkit

If your computer was used for online banking, has credit card information or other sensitive data on it, you should disconnect from the Internet until your system is cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised and change each password using a clean computer, not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?
What Should I Do If I've Become A Victim Of Identity Theft?
Identity Theft Victims Guide - What to do


Although the infection has been identified and may be removed, your PC has likely been compromised and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume the computer is secure even if the malware appears to have been removed. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired so you can never be sure that you have completely removed a rootkit. The malware may leave so many remnants behind that security tools cannot find them. Tools that claim to be able to remove rootkits cannot guarantee that all traces of it will be removed. Many experts in the security community believe that once infected with this type of malware, the best course of action is to wipe the drive clean, reformat and reinstall the OS. Please read:

When should I re-format? How should I reinstall?
Help: I Got Hacked. Now What Do I Do?
Where to draw the line? When to recommend a format and reinstall?


Should you decide not to follow that advice, we will do our best to help clean the computer of any infections but we cannot guarantee it to be trustworthy or that the removal will be successful. Some infections are difficult to remove completely because of their morphing characteristics which allows the malware to regenerate itself. Sometimes there is another hidden piece of malware which has not been detected by your security tools that protects malicious files and registry keys (which have been detected) so they cannot be permanently deleted. Disinfection will probably require the use of more powerful tools than we recommend in this forum. Before that can be done you will need you to create and post a DDS/HijackThis log for further investigation. Let me know how you wish to proceed.
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