Win32:Malware-gen + Win64:Sirefef-A + Win32:Sirefef-AO

Viruses and worms
1

Hi,

I have a notebook with Windows XP and yesterday I realized that my old antivirus was not working correctly. So I decided to install Avast, and then after a boot-time scan, it detected and moved to chest these tree “friends” on the subject.
Now, more or less every hour, the file system shield detects and moves to chest again these malwares.

My question is, how can I get rid of them?

Thank you very much.

Marcos.

2

follow the guide and attach logs:
http://forum.avast.com/index.php?topic=53253.0

also download install and scan with Superantispyware:
http://www.superantispyware.com/download.html

3

In the report of avast file system shield this morning there is only one different malware active:Dropper-gen. Maybe avast antivirus deleted them yesterday…

I send you the logs it two or three posts:

Malwarebytes’ Anti-Malware 1.51.2.1300
www.malwarebytes.org

Versión de la Base de Datos: 8373

Windows 5.1.2600 Service Pack 3
Internet Explorer 8.0.6001.18702

15/12/2011 8:42:26
mbam-log-2011-12-15 (08-42-26).txt

Tipos de Análisis: Análisis Rápido
Objetos examinados: 196476
Tiempo transcurrido: 5 minuto(s), 15 segundo(s)

Procesos en Memoria Infectados: 0
Módulos de Memoria Infectados: 0
Claves del Registro Infectadas: 0
Valores del Registro Infectados: 0
Elementos de Datos del Registro Infectados: 0
Carpetas Infectadas: 0
Archivos Infectados: 0

Procesos en Memoria Infectados:
(No se han detectado elementos maliciosos)

Módulos de Memoria Infectados:
(No se han detectado elementos maliciosos)

Claves del Registro Infectadas:
(No se han detectado elementos maliciosos)

Valores del Registro Infectados:
(No se han detectado elementos maliciosos)

Elementos de Datos del Registro Infectados:
(No se han detectado elementos maliciosos)

Carpetas Infectadas:
(No se han detectado elementos maliciosos)

Archivos Infectados:
(No se han detectado elementos maliciosos)

4

No way to post the additional info. It’s too long (more than 10000 characters). How can I do it?

5

It’s all in the instructions…!! :wink:
Read again how to attach the logs: http://forum.avast.com/index.php?topic=53253.0

6

Sorry for the inconvenience but this virus issue gets my a little nervous.

I attach the log files required and the Disk Manager screen (in the next post).

Thank you for your help.

7

I re-attach otl and extra because they were not in ansi code.

8

Hi you have the zero access infection , could you confirm that all your files/folders have returned

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

:OTL O2 - BHO: (AVG Safe Search) - {3CA2F312-6F6E-4B53-A66E-4E65E497C8C0} - C:\Archivos de programa\AVG\AVG8\avgssie.dll File not found O3 - HKLM\..\Toolbar: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKCU\..\Toolbar\ShellBrowser: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {A057A204-BACC-4D26-9990-79A187E2698E} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {E7DF6BFF-55A5-4EB7-A673-4ED3E9456D39} - No CLSID value found. O20 - HKCU Winlogon: Shell - (C:\Documents and Settings\Leticia\Configuración local\Datos de programa\8fa9e16e\X) - File not found

:Files
ipconfig /flushdns /c
xcopy %Temp%\smtmp\1 “%AllUsersProfile%\Start Menu” /H /I /S /Y /C
xcopy %Temp%\smtmp\2 “%UserProfile%\Application Data\Microsoft\Internet Explorer\Quick Launch” /H /I /S /Y /C
xcopy %Temp%\smtmp\3 “%AppData%\Roaming\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar” /H /I /S /Y /C
xcopy %Temp%\smtmp\4 “%AllUsersProfile%\Desktop” /H /I /S /Y /C

:Commands
[purity]
[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, also allow the installation of the recovery console

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.

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

9

Hi, since yesterday it seems that avast antivirus doesn’t find any other malware, but I attach a system file shield screen…

Once I’ve done all the fixes you are telling me, I’ll send you the reports.

10

I attach OTL and Combofix reports.

11

If you have all the files and folders back then run this fix… I will clear the temp files where Avast is finding them. Once done let me know of any outstanding problems

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

:OTL O3 - HKLM\..\Toolbar: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKLM\..\Toolbar: (no name) - Locked - No CLSID value found. O3 - HKCU\..\Toolbar\ShellBrowser: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {A057A204-BACC-4D26-9990-79A187E2698E} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {CCC7A320-B3CA-4199-B1A6-9F516DD69829} - No CLSID value found. O3 - HKCU\..\Toolbar\WebBrowser: (no name) - {E7DF6BFF-55A5-4EB7-A673-4ED3E9456D39} - No CLSID value found.

:Files
ipconfig /flushdns /c

:Commands
[purity]
[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.

12

I send the report attached. Thank you Essexboy.

13

Is the computer running OK now ?

14

Yes, I think so. Thank you very much Essexboy.

15

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:

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

:Commands [resethosts] [emptytemp] [CLEARALLRESTOREPOINTS] [Reboot]

[*]Then click the Run Fix button at the top
[*]Let the program run unhindered, reboot the PC when it is done

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

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: