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Win32/Filecoder.NAG (Exploit.Drop.GS) trojan has encrypted my documents


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#1 ptpo

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Posted 07 December 2012 - 07:31 AM

ESET NOD32 Antivirus found on my computer "Win32/Filecoder.NAG" trojan horse (zWlHH.exe), but antivirus wasn't able to remove it.

I restart my computer in save mode and removed virus files "by hand". I gues I've succeeded remove this trojan, but unfortunately it encrypted documents files (for example: xls, doc, rtf, pdf, jpg, txt) on my local disks and it rename extensions of all of them into ".block".

I also installed Malwarebytes Anti-Malware 1.65.1.1000 (database version: v2012.12.03.06) and scanned my system.

Anti-Malware found the one file:
C:\Documents and Settings\adamk\wgsdgsdgdsgsd.exe (Exploit.Drop.GS)

It added this file to quarantine and successful removed it.

Is there any chance to recover my encrypted documents?

Does it help me in recovering of encrypted files if I run “System Recovery” Windows application?

I send copy of trojan files, packed into .zip archive (password: pp) and a few encrypted documents as attachment.

Can you help me?


Here is DDS log:
------------------------------------------------
DDS (Ver_2012-11-20.01) - NTFS_x86
Internet Explorer: 8.0.6001.18702 BrowserJavaVersion: 1.6.0_24
Run by adamk at 11:43:30 on 2012-12-07
Microsoft Windows XP Professional 5.1.2600.3.1250.48.1045.18.1022.525 [GMT 1:00]
.
AV: ESET NOD32 Antivirus 4.2 *Enabled/Updated* {E5E70D32-0101-4F12-8FB0-D96ACA4F34C0}
.
============== Running Processes ================
.
C:\WINDOWS\system32\nvsvc32.exe
C:\WINDOWS\system32\spoolsv.exe
C:\Program Files\ESET\ESET NOD32 Antivirus\ekrn.exe
C:\Program Files\Java\jre6\bin\jqs.exe
c:\Program Files\Matrox Graphics Inc\PowerDesk\Services\Matrox.PowerDesk.Services.exe
c:\Program Files\Matrox Graphics Inc\PowerDesk SE\Matrox.Pdesk.ServicesHost.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbamscheduler.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbamservice.exe
C:\WINDOWS\system32\mgabg.exe
C:\WINDOWS\system32\wdfmgr.exe
C:\Program Files\TightVNC\WinVNC.exe
C:\WINDOWS\System32\alg.exe
C:\Program Files\Malwarebytes' Anti-Malware\mbamgui.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\Analog Devices\Core\smax4pnp.exe
C:\Program Files\ESET\ESET NOD32 Antivirus\egui.exe
C:\WINDOWS\system32\ctfmon.exe
E:\REST2514\Restoration.exe
C:\WINDOWS\system32\NOTEPAD.EXE
C:\WINDOWS\system32\wbem\wmiprvse.exe
C:\WINDOWS\System32\svchost.exe -k netsvcs
C:\WINDOWS\system32\svchost.exe -k NetworkService
C:\WINDOWS\system32\svchost.exe -k LocalService
C:\WINDOWS\system32\svchost.exe -k LocalService
.
============== Pseudo HJT Report ===============
.
uStart Page = hxxp://www.google.pl/
BHO: Adobe PDF Link Helper: {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - c:\program files\common files\adobe\acrobat\activex\AcroIEHelperShim.dll
BHO: Java™ Plug-In 2 SSV Helper: {DBC80044-A445-435b-BC74-9C25C1C588A9} - c:\program files\java\jre6\bin\jp2ssv.dll
BHO: JQSIEStartDetectorImpl Class: {E7E6F031-17CE-4C07-BC86-EABFE594F69C} - c:\program files\java\jre6\lib\deploy\jqs\ie\jqs_plugin.dll
uRun: [CTFMON.EXE] c:\windows\system32\ctfmon.exe
uRun: [SecdrvUpdate] "c:\documents and settings\adamk\dane aplikacji\zWlHH.exe"
mRun: [SoundMAXPnP] c:\program files\analog devices\core\smax4pnp.exe
mRun: [nwiz] c:\program files\nvidia corporation\nview\nwiz.exe /installquiet
mRun: [NvCplDaemon] RUNDLL32.EXE c:\windows\system32\NvCpl.dll,NvStartup
mRun: [WinVNC] "c:\program files\tightvnc\WinVNC.exe" -servicehelper
mRun: [Adobe Reader Speed Launcher] "c:\program files\adobe\reader 9.0\reader\Reader_sl.exe"
mRun: [Adobe ARM] "c:\program files\common files\adobe\arm\1.0\AdobeARM.exe"
mRun: [egui] "c:\program files\eset\eset nod32 antivirus\egui.exe" /hide /waitservice
dRun: [CTFMON.EXE] c:\windows\system32\CTFMON.EXE
StartupFolder: c:\docume~1\adamk\menust~1\programy\autost~1\mozill~1.lnk - c:\program files\mozilla thunderbird\thunderbird.exe
StartupFolder: c:\docume~1\alluse~1\menust~1\programy\autost~1\micros~1.lnk - c:\program files\microsoft office\office\FINDFAST.EXE
uPolicies-Explorer: NoDriveTypeAutoRun = dword:145
mPolicies-Explorer: NoDriveTypeAutoRun = dword:255
mPolicies-Explorer: NoDriveTypeAutoRun = dword:145
IE: {e2e2dd38-d088-4134-82b7-f2ba38496583} - %windir%\Network Diagnostic\xpnetdiag.exe
IE: {FB5F1910-F110-11d2-BB9E-00C04F795683} - c:\program files\messenger\msmsgs.exe
DPF: {6414512B-B978-451D-A0D8-FCFDF33E833C} - hxxp://update.microsoft.com/windowsupdate/v6/V5Controls/en/x86/client/wuweb_site.cab?1303807933687
DPF: {8AD9C840-044E-11D1-B3E9-00805F499D93} - hxxp://java.sun.com/update/1.6.0/jinstall-1_6_0_24-windows-i586.cab
DPF: {CAFEEFAC-0016-0000-0024-ABCDEFFEDCBA} - hxxp://java.sun.com/update/1.6.0/jinstall-1_6_0_24-windows-i586.cab
DPF: {CAFEEFAC-FFFF-FFFF-FFFF-ABCDEFFEDCBA} - hxxp://java.sun.com/update/1.6.0/jinstall-1_6_0_24-windows-i586.cab
DPF: {D27CDB6E-AE6D-11CF-96B8-444553540000} - hxxp://fpdownload2.macromedia.com/get/shockwave/cabs/flash/swflash.cab
.
================= FIREFOX ===================
.
FF - ProfilePath - c:\documents and settings\adamk\dane aplikacji\mozilla\firefox\profiles\ulsuxb7b.default\
FF - component: c:\program files\mozilla firefox\extensions\{82af8dca-6de9-405d-bd5e-43525bdad38a}\components\SkypeFfComponent.dll
FF - plugin: c:\documents and settings\adamk\ustawienia lokalne\dane aplikacji\unity\webplayer\loader\npUnity3D32.dll
FF - plugin: c:\documents and settings\all users\dane aplikacji\gadu-gadu 10\_userdata\npgg.4.dll
FF - plugin: c:\program files\adobe\reader 9.0\reader\air\nppdf32.dll
FF - plugin: c:\program files\java\jre6\bin\new_plugin\npdeployJava1.dll
FF - plugin: c:\program files\mozilla firefox\plugins\npdeployJava1.dll
FF - plugin: c:\program files\mozilla firefox\plugins\npdjvu.dll
FF - plugin: c:\windows\system32\macromed\flash\NPSWF32_11_4_402_287.dll
FF - ExtSQL: !HIDDEN! 2011-04-26 13:55; {20a82645-c095-46ed-80e3-08825760534b}; c:\windows\microsoft.net\framework\v3.5\windows presentation foundation\DotNetAssistantExtension
.
============= SERVICES / DRIVERS ===============
.
R1 ehdrv;ehdrv;c:\windows\system32\drivers\ehdrv.sys [2010-7-29 115008]
R1 epfwtdir;epfwtdir;c:\windows\system32\drivers\epfwtdir.sys [2010-8-3 94872]
R2 ekrn;ESET Service;c:\program files\eset\eset nod32 antivirus\ekrn.exe [2011-11-22 814264]
R2 Matrox Centering Service;Matrox Centering Service;c:\program files\matrox graphics inc\powerdesk\services\Matrox.PowerDesk.Services.exe [2010-2-11 1266944]
R2 Matrox.Pdesk.ServicesHost;Matrox.Pdesk.ServicesHost;c:\program files\matrox graphics inc\powerdesk se\Matrox.Pdesk.ServicesHost.exe [2010-2-11 344832]
R2 MBAMScheduler;MBAMScheduler;c:\program files\malwarebytes' anti-malware\mbamscheduler.exe [2012-12-6 399432]
R2 MBAMService;MBAMService;c:\program files\malwarebytes' anti-malware\mbamservice.exe [2012-12-6 676936]
R3 dfmirage;dfmirage;c:\windows\system32\drivers\dfmirage.sys [2005-11-25 31896]
R3 MBAMProtector;MBAMProtector;c:\windows\system32\drivers\mbam.sys [2012-12-6 22856]
S3 cpuz130;cpuz130;\??\c:\docume~1\piotrw\ustawi~1\temp\cpuz130\cpuz_x32.sys --> c:\docume~1\piotrw\ustawi~1\temp\cpuz130\cpuz_x32.sys [?]
.
=============== File Associations ===============
.
FileExt: .scr: AutoCADScriptFile="c:\windows\notepad.exe" "%1"
ShellExec: DWGVIEWR.exe: open="c:\program files\autodesk\dwg trueview 2011\DWGVIEWR.exe"
.
=============== Created Last 30 ================
.
2012-12-06 15:33:52 105696 ----a-w- C:\decoder.exe
2012-12-06 15:12:57 264032 ----a-w- C:\te94decrypt.exe
2012-12-06 14:04:08 -------- d-----w- c:\documents and settings\all users\dane aplikacji\Malwarebytes
2012-12-06 14:04:06 22856 ----a-w- c:\windows\system32\drivers\mbam.sys
2012-12-06 14:04:06 -------- d-----w- c:\program files\Malwarebytes' Anti-Malware
.
==================== Find3M ====================
.
2012-10-22 19:57:10 1866624 ----a-w- c:\windows\system32\win32k.sys
2012-10-09 07:55:13 73656 ----a-w- c:\windows\system32\FlashPlayerCPLApp.cpl
2012-10-09 07:55:13 696760 ----a-w- c:\windows\system32\FlashPlayerApp.exe
2012-10-09 07:55:08 10220472 ----a-w- c:\windows\system32\FlashPlayerInstaller.exe
2012-10-02 18:04:38 58368 ----a-w- c:\windows\system32\synceng.dll
.
============= FINISH: 11:43:57,48 ===============

Attached Files



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#2 HelpBot

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Posted 12 December 2012 - 07:35 AM

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#3 oneof4

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Posted 13 December 2012 - 04:27 PM

Hi,

Welcome to Bleeping Computer. My name is oneof4 and I will be helping you with your log.
Please subscribe to this topic, if you haven't already. You can subscribe by clicking the Watch Topic box to the right of your topic title and selecting Immediate Notification.


Please avoid installing/uninstalling or updating any programs and attempting any unsupervised fixes or scans. This can make helping you impossible.


Please reply to this post so I know you are there.

The forum is busy and we need to have replies as soon as possible. If I haven't had a reply after 3 days I will bump the topic and if you do not reply by the following day after that then I will close the topic.

Once I receive a reply then I will return with your first instructions.

Thanks :thumbup2:

Best Regards,
oneof4.


#4 ptpo

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Posted 13 December 2012 - 05:40 PM

Hi!

I'm still here;-)

Besides, I described my problem and sent it to ESET support a week ago, but I have received no solution yet;-(

Edited by ptpo, 13 December 2012 - 05:43 PM.


#5 oneof4

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Posted 15 December 2012 - 06:10 PM

Hello :)

I haven't forgotten you, just researching your issue, and working toward a possible solution. I'll get something posted for you ASAP.

Best Regards,
oneof4.


#6 oneof4

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Posted 16 December 2012 - 08:26 AM

Hello ptpo, and :welcome: to the Virus/Trojan/Spyware/Malware Removal forum.

I am oneof4, and I am here to help you!

  • I ask that you refrain from running tools other than those I suggest to you while I am cleaning up your computer. The reason for this is so I know what is going on with the machine at any time. Some programs can interfere with others and hamper the recovery process.
  • Please perform all steps in the order received and do not proceed if you need clarification.
  • Please copy and paste all logs into your post unless directed otherwise. Please do not re-run any programs I suggest. If you encounter problems please stop and tell me about it. When your computer is clean I will alert you of such. I will also provide you with detailed suggestions for prevention.
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  • Again I would like to remind you to make no further changes to your computer unless I direct you to do so. Your computer fix will be based on the current condition of your computer! Any changes might delay my ability to help you.

==========

I notice that you have downloaded & installed te94decrypt.exe by DrWeb

Let's try using that method to get your files back to normal:

Press and hold the Windows key Posted Image and then press the letter R on your keyboard.
This opens the Run dialog box.
Copy and paste the below text inside the text-field:
  • C:\te94decrypt.exe -k 186
Now press ENTER
The tool should open and start scanning your system to repair the .BLOCK files to their original decrypted state.

Note: Some users report that C:\te94decrypt.exe -k 85 worked for them. So try that one incase the first command was not successful.

Post back here afterward to let me know if it was successful.

Best Regards,
oneof4.


#7 ptpo

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Posted 17 December 2012 - 03:29 AM

I ran te94decrypt.exe utility twice, with "-k 186" and "-k 85" parameter, but it wasn't successful. I got message "Decrypted 0 file(s)".

#8 oneof4

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Posted 17 December 2012 - 07:06 AM

You asked this question in your initial post:

Does it help me in recovering of encrypted files if I run “System Recovery” Windows application?

Are you talking about the "System Restore" feature built in to Windows, or a System Recovery application on a disk?

Best Regards,
oneof4.


#9 ptpo

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Posted 17 December 2012 - 07:46 AM

I've meant "System Restore feature built in to Windows". I'm sorry, I wrongly translated it into English from my native language.

#10 oneof4

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Posted 18 December 2012 - 06:59 AM

Hey :)

Please perform the following search for a file named: Initia1Log.txt.block

The file is usually located in your %AppData% directory (press Windows key + R, type "%appdata%" and press Enter to go there).

Post back and let me know if it's there. (It's critical that we have this file for decryption)

Edited by oneof4, 18 December 2012 - 07:01 AM.

Best Regards,
oneof4.


#11 ptpo

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Posted 20 December 2012 - 02:56 AM

I'm sorry I haven't found "Initia1Log.txt.block" file on my hard disk (including "%appdata%" folder;-(

#12 oneof4

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Posted 21 December 2012 - 09:20 AM

Hey ptpo, :)

Okay, let's try this:

Download Recuva from here, and save it to your Desktop. Double-click the rcsetup144.exe icon to install the program, then follow the instructions below:

  • Start Recuva in Advanced mode. If the Wizard appears, select Do Not Show This Wizard on Startup and then click Cancel.
  • In Recuva's main window, type Initia1Log.txt.block into the Filename or path box. Select the location you want to search from the drop-down box at left, and then click Scan.
  • Recuva displays the progress of the scan, and then shows its search results in the main window. If the file(s) you're looking for aren't in the list, see below.
  • Select the check boxes beside the file or files you want to restore. The color of the dot next to the file name indicates your chances for a successful recovery (green for excellent, orange for acceptable, and red for unlikely)
  • Click Recover. Select a destination for the recovered files (ideally, on another drive). Click OK.

If Step 4 did not locate the files you were seeking, select Deep Scan in the Options dialog box on the Actions tab. Run Step 5 again. This advanced scan will take much longer (it can take hours).

Best Regards,
oneof4.


#13 oneof4

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Posted 26 December 2012 - 04:21 PM

Are you still with us?

Best Regards,
oneof4.


#14 Elise

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Posted 30 December 2012 - 03:31 AM

Due to the lack of feedback, this topic is now closed.In the event you still have problems, please send me or any Moderator a Private Message and ask them to reopen this topic within the next 5 days. Please include a link to your topic in the Private Message. Thank you.

regards, Elise


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