Win32:Explor-DU [Trj]

Viruses and worms
1

Windows crashed while I was playing a game. After restarting it, the whole desktop turned gray when started normally.
I tried to restart it using Safe Mode with Networking, and do a system scan using Avast. It gave me 2 results. Both has the same error message.

File Name: C\Windows\explorer.exe
Severity: High
Status: Threat: Win32:Explor-DU [Trj]

I couldn’t remove it. I tried to go to my user account and lowered the security settings to check my explorer.exe.
I restarted my system again normally, and it went back to normal, but I can sense that my Facebook crashes and some other stuff.

How can I remove this Trojan? I couldn’t find any answer or help in Google :frowning:

2

Please attach your logs. (AdwCleaner, MBAM, OTL and aswMBR…!!)
Instructions: http://forum.avast.com/index.php?topic=53253.0

3

AdwCleaner v2.100 - Logfile created 12/13/2012 at 14:40:37

Updated 09/12/2012 by Xplode

Operating system : Windows 7 Ultimate (32 bits)

User : Admin - JAZZYDYTES

Boot Mode : Normal

Running from : C:\Users\Admin\Downloads\Programs\adwcleaner.exe

Option [Delete]

***** [Services] *****

***** [Files / Folders] *****

Folder Deleted : C:\Program Files\Conduit
Folder Deleted : C:\Program Files\DVDVideoSoftTB
Folder Deleted : C:\Users\Admin\AppData\Local\Conduit
Folder Deleted : C:\Users\Admin\AppData\Local\Temp\CT2269050
Folder Deleted : C:\Users\Admin\AppData\LocalLow\Conduit
Folder Deleted : C:\Users\Admin\AppData\LocalLow\DVDVideoSoftTB
Folder Deleted : C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hjs91m86.default\extensions{872b5b88-9db5-4310-bdd0-ac189557e5f5}
Folder Deleted : C:\Users\Admin\AppData\Roaming\OpenCandy

***** [Registry] *****

Key Deleted : HKCU\Software\AppDataLow\Software\Conduit
Key Deleted : HKCU\Software\AppDataLow\Software\ConduitSearchScopes
Key Deleted : HKCU\Software\AppDataLow\Software\DVDVideoSoftTB
Key Deleted : HKCU\Software\AppDataLow\Software\SmartBar
Key Deleted : HKCU\Software\AppDataLow\Toolbar
Key Deleted : HKCU\Software\Default Tab
Key Deleted : HKCU\Software\Microsoft\Internet Explorer\SearchScopes{AFDBDDAA-5D3F-42EE-B79C-185A7020515B}
Key Deleted : HKCU\Software\Softonic
Key Deleted : HKLM\SOFTWARE\Classes\CLSID{3C471948-F874-49F5-B338-4F214A2EE0B1}
Key Deleted : HKLM\SOFTWARE\Classes\CLSID{872B5B88-9DB5-4310-BDD0-AC189557E5F5}
Key Deleted : HKLM\SOFTWARE\Classes\CLSID{D3F69D07-0AEE-47AF-87D0-1A67D4F70C68}
Key Deleted : HKLM\SOFTWARE\Classes\Toolbar.CT2269050
Key Deleted : HKLM\Software\Conduit
Key Deleted : HKLM\Software\Default Tab
Key Deleted : HKLM\Software\DVDVideoSoftTB
Key Deleted : HKLM\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy{4B2B5427-3C57-491F-8C45-5A0520557F7C}
Key Deleted : HKLM\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy{5B736C46-8390-497A-9B61-31B5C8C96D1B}
Key Deleted : HKLM\SOFTWARE\Microsoft\Internet Explorer\SearchScopes{AFDBDDAA-5D3F-42EE-B79C-185A7020515B}
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects{872B5B88-9DB5-4310-BDD0-AC189557E5F5}
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Ext\PreApproved{D3F69D07-0AEE-47AF-87D0-1A67D4F70C68}
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\DVDVideoSoftTB Toolbar
Key Deleted : HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\IM
Value Deleted : HKCU\Software\Microsoft\Internet Explorer\URLSearchHooks [{872B5B88-9DB5-4310-BDD0-AC189557E5F5}]
Value Deleted : HKLM\SOFTWARE\Microsoft\Internet Explorer\Toolbar [{872B5B88-9DB5-4310-BDD0-AC189557E5F5}]
Value Deleted : HKLM\SOFTWARE\Microsoft\Internet Explorer\URLSearchHooks [{872B5B88-9DB5-4310-BDD0-AC189557E5F5}]

***** [Internet Browsers] *****

-\ Internet Explorer v8.0.7600.16385

Replaced : [HKCU\Software\Microsoft\Internet Explorer\Main - Start Page] = hxxp://search.conduit.com?SearchSource=10&ctid=CT2269050 → hxxp://www.google.com

-\ Mozilla Firefox v14.0.1 (en-US)

Profile name : default
File : C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\hjs91m86.default\prefs.js

Deleted : user_pref(“CT2269050.autoDisableScopes”, -1);

-\ Google Chrome v23.0.1271.95

File : C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

[OK] File is clean.

AdwCleaner[S1].txt - [3553 octets] - [13/12/2012 14:40:37]

########## EOF - C:\AdwCleaner[S1].txt - [3613 octets] ##########

Malwarebytes Anti-Malware 1.65.1.1000
www.malwarebytes.org

Database version: v2012.12.13.02

Windows 7 x86 NTFS
Internet Explorer 8.0.7600.16385
Admin :: JAZZYDYTES [administrator]

12/13/2012 2:49:31 PM
mbam-log-2012-12-13 (14-49-31).txt

Scan type: Quick scan
Scan options enabled: Memory | Startup | Registry | File System | Heuristics/Extra | Heuristics/Shuriken | PUP | PUM
Scan options disabled: P2P
Objects scanned: 192690
Time elapsed: 2 minute(s), 43 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 0
(No malicious items detected)

Registry Values Detected: 0
(No malicious items detected)

Registry Data Items Detected: 0
(No malicious items detected)

Folders Detected: 0
(No malicious items detected)

Files Detected: 0
(No malicious items detected)

(end)

aswMBR version 0.9.9.1707 Copyright(c) 2011 AVAST Software
Run date: 2012-12-13 14:53:27

14:53:27.536 OS Version: Windows 6.1.7600
14:53:27.536 Number of processors: 4 586 0x3A09
14:53:27.536 ComputerName: JAZZYDYTES UserName: Admin
14:53:32.615 Initialize success
14:53:32.911 AVAST engine defs: 12121300
14:54:19.816 Disk 0 (boot) \Device\Harddisk0\DR0 → \Device\Ide\IAAStorageDevice-0
14:54:19.816 Disk 0 Vendor: ST350041 JC4B Size: 476940MB BusType: 3
14:54:19.832 Disk 0 MBR read successfully
14:54:19.832 Disk 0 MBR scan
14:54:19.832 Disk 0 Windows 7 default MBR code
14:54:19.847 Disk 0 Partition 1 80 (A) 07 HPFS/NTFS NTFS 100 MB offset 2048
14:54:19.863 Disk 0 Partition 2 00 07 HPFS/NTFS NTFS 100900 MB offset 206848
14:54:19.878 Disk 0 Partition 3 00 07 HPFS/NTFS NTFS 375938 MB offset 206850048
14:54:19.894 Disk 0 scanning sectors +976771072
14:54:19.972 Disk 0 scanning C:\Windows\system32\drivers
14:54:25.822 Service scanning
14:54:36.203 Modules scanning
14:54:38.683 Disk 0 trace - called modules:
14:54:38.699 ntkrnlpa.exe CLASSPNP.SYS disk.sys ACPI.sys halmacpi.dll iaStor.sys
14:54:38.699 1 nt!IofCallDriver → \Device\Harddisk0\DR0[0x86649460]
14:54:38.699 3 CLASSPNP.SYS[8c58d59e] → nt!IofCallDriver → [0x85d6c958]
14:54:38.699 5 ACPI.sys[8428a3b2] → nt!IofCallDriver → \Device\Ide\IAAStorageDevice-0[0x85cc6028]
14:54:41.210 AVAST engine scan C:\Windows
14:54:41.756 File: C:\Windows\explorer.exe INFECTED Win32:Explor-DU [Trj]
14:54:42.006 File: C:\Windows\explorer_backup_w7sbc.exe INFECTED Win32:Explor-DU [Trj]
14:54:42.287 File: C:\Windows\explorer_edit_w7sbc.exe INFECTED Win32:Explor-DU [Trj]
14:54:47.325 AVAST engine scan C:\Windows\system32
14:55:53.122 AVAST engine scan C:\Windows\system32\drivers
14:55:59.128 AVAST engine scan C:\Users\Admin
14:57:08.790 AVAST engine scan C:\ProgramData
14:57:33.344 Scan finished successfully
14:57:53.711 Disk 0 MBR has been saved successfully to “C:\Users\Admin\Documents\MBR.dat”
14:57:53.727 The log file has been saved successfully to “C:\Users\Admin\Documents\aswMBR.txt”

OTL text file is attached ~

4

Aside from the gray screen when I start windows normally, it seems that whenever I surf Facebook, it doesn’t work properly. It freezes. :confused:
I’m not so techie and I don’t really know some terms but I’d gladly follow whatever help I may receive from you. Thank you ~

5

Please be patient.

6

Just want to BUMP this. Would really like some help :<

7

We will need to replace explorer, but you do have a spare

Warning This fix is only relevant for this system and no other, using on another computer may cause problems

Be advised that when the fix commences it will shut down all running processes and you may lose the desktop and icons, they will return on reboot

Run OTL

[*]Under the Custom Scans/Fixes box at the bottom, paste in the following

https://dl.dropbox.com/u/73555776/OTL_Fix.GIF


:OTL
[2012/11/29 12:27:32 | 002,613,248 | ---- | C] (Microsoft Corporation) -- C:\Windows\explorer_edit_w7sbc.exe
[2012/11/29 12:27:32 | 002,613,248 | ---- | C] (Microsoft Corporation) -- C:\Windows\explorer_backup_w7sbc.exe
[2012/11/29 12:27:32 | 000,000,000 | ---D | C] -- C:\Windows\W7SBC
[2012/11/28 21:01:13 | 000,000,000 | ---D | C] -- C:\Windows\System32\o1uwaÛ_w
[2012/11/28 17:16:46 | 000,000,000 | ---D | C] -- C:\Windows\System32\o1zw¡ˆw

:Commands
[resethosts]
[emptytemp]
[CREATERESTOREPOINT]
[Reboot]

[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done
[*]Open OTL again and click the Quick Scan button. Post the log it produces in your next reply.

THEN

Download and Install Combofix

Download ComboFix from one of the following locations:
Link 1
Link 2

VERY IMPORTANT !!! Save ComboFix.exe to your Desktop

  • IMPORTANT - Disable your AntiVirus and AntiSpyware applications, usually via a right click on the System Tray icon. They may otherwise interfere with our tools. If you have difficulty properly disabling your protective programs, refer to this link here

[*]Double click on ComboFix.exe & follow the prompts.
[*]Accept the disclaimer and allow to update if it asks

http://img.photobucket.com/albums/v706/ried7/NSIS_disclaimer_ENG.png

http://img.photobucket.com/albums/v706/ried7/NSIS_extraction.png

[*]When finished, it shall produce a log for you.
[*]Please include the C:\ComboFix.txt in your next reply.

Notes:

  1. Do not mouse-click Combofix’s window while it is running. That may cause it to stall.
  2. Do not “re-run” Combofix. If you have a problem, reply back for further instructions.
  3. If after the reboot you get errors about programmes being marked for deletion then reboot, that will cure it.

Please make sure you include the combo fix log in your next reply as well as describe how your computer is running now

8

I’ve stumbled upon the same problem today. I had this custom theme installed (had to replace my explorer.exe with the one provided), could it be that after updating virus definitions, those files were falsely treated as trojans by Avast? I’ve been using said theme for quite a while, and it came from a somewhat trusted source.

I had the original explorer.exe backed up, so I just replaced it back. Plan on doing a fresh install soon anyway, but eh.

9

Combofix will detect it if it is infected… Is it part of window blinds

10

Computer is running fine now. I’m not sure if this is totally fixed already.
I’ve attached the logs and the screenshot of my desktop BEFORE I did the fix.
Now, everything’s back to how it looks in its previous state before the virus was detected.

I will wait for further help. Thanks so much much in advance!

11

I also have to add this. Yesterday, when I scanned my system, I used Quick scan and it detected 2 viruses.
Now, I scanned it again, there’s nothing.

12

Combofix was not sure about the MD5 on the explorer file however, it did not find it infected. The MD5 appears to be from window blinds

Any further problems

13

None so far. It’s working fine now.

14

Subject to no further problems :slight_smile:

I will remove my tools now and give some recommendations, but, I would like you to run for 24 hours or so and come back if you have any problems

Now the best part of the day ----- Your log now appears clean :thumbsup:

A good workman always cleans up after himself so…The following will implement some cleanup procedures as well as reset System Restore points:

Remove ComboFix
[*]Hold down the Windows key + R on your keyboard. This will display the Run dialogue box
[*]In the Run box, type in ComboFix /Uninstall
(Notice the space between the “x” and “/”)
then click OK

http://i1224.photobucket.com/albums/ee362/Essexboy3/Misc%20screen%20shots/CF_Uninstall-1.jpg

[]Follow the prompts on the screen
[]A message should appear confirming that ComboFix was uninstalled

Run OTL and hit the cleanup button. It will remove all the programmes we have used plus itself.

We will now confirm that your hidden files are set to that, as some of the tools I use will change that
[*]Click Start.
[*]Open My Computer.
[*]Select the Tools menu and click Folder Options.
[*]Select the View Tab.
[*]Under the Hidden files and folders heading select Do not show hidden files and folders.
[]Click Yes to confirm.
[]Click OK.

http://users.telenet.be/bluepatchy/miekiemoes/images/javaicon.gif
Your Java is out of date.
Older versions have vulnerabilities that malware can use to infect your system.
Please follow these steps to remove older version of Java components and upgrade the application.

Upgrading Java:
[] Go to this site and click Do I have Java
[] It will check your current version and then offer to update to the latest version

Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

http://img233.imageshack.us/img233/7729/mbamicontw5.gif
Malwarebytes.

Update and run weekly to keep your system clean

Download and install FileHippo update checker and run it monthly it will show you which programmes on your system need updating and give a download link

If you use on-line banking then as an added layer of protection install Trusteer Rapport

It is critical to have both a firewall and anti virus to protect your system and to keep them updated. To keep your operating system up to date visit
[*]Microsoft Windows Update

To learn more about how to protect yourself while on the internet read our little guide How did I get infected in the first place ?Keep safe :wave: