Author Topic: Win32 downloader -pku frequent alerts  (Read 2218 times)

Offline 612163

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Win32 downloader -pku frequent alerts
« on: July 17, 2012, 10:34:59 AM »
Hi, I too am having problems with Avast giving me frequent warnings that Win32 downloader-pku has been blocked and moved to chest. Does this mean that my machine IS infected or does it just tell me that a threat has been made. Yesterday I ran the anti malware programmes and each time there were threats that have been removed. If my machine is infected and I am not able to remove the threats I do have a disk image file that was created by Win7 backup from about 3 weeks ago. Would it be safe to reload the pc from this ?.
Here are two of my log files I got when running malware software yesterday.
log 1
Malwarebytes Anti-Malware 1.62.0.1300
www.malwarebytes.org

Database version: v2012.07.16.06

Windows 7 Service Pack 1 x86 NTFS
Internet Explorer 9.0.8112.16421
S&J :: SJ-LAPTOP [administrator]

16/07/2012 11:35:04
mbam-log-2012-07-16 (11-35-04).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: 249703
Time elapsed: 22 minute(s), 12 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 1
HKCU\SOFTWARE\CLASSES\CLSID\{42AEDC87-2188-41FD-B9A3-0C966FEABEC1}\INPROCSERVER32 (Trojan.Zaccess) -> Quarantined and deleted successfully.

Registry Values Detected: 1
HKCU\SOFTWARE\CLASSES\CLSID\{42aedc87-2188-41fd-b9a3-0c966feabec1}\InprocServer32| (Trojan.Zaccess) -> Data: C:\Users\S&J\AppData\Local\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\n. -> Quarantined and deleted successfully.

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

Folders Detected: 0
(No malicious items detected)

Files Detected: 3
C:\Windows\assembly\GAC\Desktop.ini (Trojan.0access) -> Quarantined and deleted successfully.
C:\Windows\Installer\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\U\00000004.@ (Rootkit.0Access) -> Quarantined and deleted successfully.
C:\Windows\Installer\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\U\00000008.@ (Trojan.Dropper.BCMiner) -> Quarantined and deleted successfully.

(end)

log 2 from a full scan
Malwarebytes Anti-Malware 1.62.0.1300
www.malwarebytes.org

Database version: v2012.07.16.06

Windows 7 Service Pack 1 x86 NTFS
Internet Explorer 9.0.8112.16421
S&J :: SJ-LAPTOP [administrator]

16/07/2012 11:35:04
mbam-log-2012-07-16 (11-35-04).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: 249703
Time elapsed: 22 minute(s), 12 second(s)

Memory Processes Detected: 0
(No malicious items detected)

Memory Modules Detected: 0
(No malicious items detected)

Registry Keys Detected: 1
HKCU\SOFTWARE\CLASSES\CLSID\{42AEDC87-2188-41FD-B9A3-0C966FEABEC1}\INPROCSERVER32 (Trojan.Zaccess) -> Quarantined and deleted successfully.

Registry Values Detected: 1
HKCU\SOFTWARE\CLASSES\CLSID\{42aedc87-2188-41fd-b9a3-0c966feabec1}\InprocServer32| (Trojan.Zaccess) -> Data: C:\Users\S&J\AppData\Local\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\n. -> Quarantined and deleted successfully.

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

Folders Detected: 0
(No malicious items detected)

Files Detected: 3
C:\Windows\assembly\GAC\Desktop.ini (Trojan.0access) -> Quarantined and deleted successfully.
C:\Windows\Installer\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\U\00000004.@ (Rootkit.0Access) -> Quarantined and deleted successfully.
C:\Windows\Installer\{289e3c44-f12b-e917-8bc1-cf6aa136111a}\U\00000008.@ (Trojan.Dropper.BCMiner) -> Quarantined and deleted successfully.

(end)

Any help would be appreciated.

Offline DavidR

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Re: Win32 downloader -pku frequent alerts
« Reply #1 on: July 17, 2012, 10:57:38 AM »
This needs further analysis by a malware removal specialist:
Go to this topic http://forum.avast.com/index.php?topic=53253.0 for information on Logs to assist in cleaning malware. Use the information about getting and using the tools and attach the remainder of logs here, not in the LOGS topic.
Core2Duo E8300/ 4GB Ram/ WinXP ProSP3/ avast! free 2014 9.0.2018/ Outpost Firewall Pro9.1/ Firefox 28.0, NoScript, RequestPolicy/ MailWasher Pro/ DropMyRights/ MalwareBytes AntiMalware Premium 2.0.1/ WinPatrol+/ Drive Image 7.1/ SnagIt 10.0/ avast! mobile security

Offline 612163

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Re: Win32 downloader -pku frequent alerts
« Reply #2 on: July 17, 2012, 12:29:37 PM »
Here are the logs as requested

Offline DavidR

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Re: Win32 downloader -pku frequent alerts
« Reply #3 on: July 17, 2012, 12:42:57 PM »
It will probably be a little while before a malware removal specialist can check the logs (time zone ping pong and work commitments). Essexboy who deals with the bulk of these is probably still at work (now almost 13:45pm in the UK).
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Offline essexboy

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Re: Win32 downloader -pku frequent alerts
« Reply #4 on: July 17, 2012, 06:53:52 PM »
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


    Quote
    :OTL
    IE - HKU\S-1-5-21-2091248313-2636163150-179697526-1000\..\SearchScopes\{70D46D94-BF1E-45ED-B567-48701376298E}: "URL" = http://127.0.0.1:4664/search&s=ErpaJjMBuHF54rgfVzd4AsRPxOc?q={searchTerms}
    O2 - BHO: (no name) - {83A2F9B1-01A2-4AA5-87D1-45B6B8505E96} - No CLSID value found.
    O3 - HKLM\..\Toolbar: (no name) - {0BF43445-2F28-4351-9252-17FE6E806AA0} - No CLSID value found.

    :Files
    ipconfig /flushdns /c
    C:\Windows\assembly\GAC\Desktop.ini
    C:\Windows\Installer\{289e3c44-f12b-e917-8bc1-cf6aa136111a}
    C:\Users\S&J\AppData\Local\{289e3c44-f12b-e917-8bc1-cf6aa136111a}

    :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




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

Offline 612163

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Re: Win32 downloader -pku frequent alerts
« Reply #5 on: July 18, 2012, 08:55:03 AM »
First of all, thank you very much for your help, you have certainly made the job easy. I have attached the log file from the OTL run, I then disabled Avast ready to run Combo fix, but during the run I had a message to say that avast antivirus and avast antispyware scanners were still active but that Combofix would continue to run. As I had seen the point about not running Combofix a second time I allowed it to continue to completion. I had disconnected from the router during these runs.  The combofix text is also attached and since doing these procedures I haven't had any virus messages appear.  From what you have been able to see, was my machine infected ? and should I be taking any steps to change passwords for banking etc. Since the start of my problems I have not logged on to any site that requires a password except for using outlook once to get emails.
Thanks again 

Offline essexboy

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Re: Win32 downloader -pku frequent alerts
« Reply #6 on: July 18, 2012, 12:51:15 PM »
Unfortunately due to the current nature of malware, there is in effect a programme that you can buy (if so inclined) that can be used for a variety of different purposes.  So I would always recommend that you change passwords and monitor accounts, in case you have the variety that steals passwords

Could you check the system out now .. Windows updates AV etc and ensure that they are working properly

Also do you have any additional problems ?

Offline 612163

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Re: Win32 downloader -pku frequent alerts
« Reply #7 on: July 18, 2012, 05:48:32 PM »
I think that everything is now working ok and no updates were required, also I have changed all the passwords as necessary so hopefully will be all ok now. Thanks again for all your help it is really appreciated.
best regards

Offline essexboy

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Re: Win32 downloader -pku frequent alerts
« Reply #8 on: July 18, 2012, 06:54:31 PM »
Subject to no further problems   :)

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
    Quote
    :Commands
    [resethosts]
    [emptytemp]
    [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



  • 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
  • Go to control panel
  • Select folder options (Appearance > Folder options in category view)
  • 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.

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
SPRING CLEAN

To manually create a new Restore Point
 
  • Go to Control Panel and select System
  • Select System
  • On the left select System Protection and accept the warning if you get one
  • Select System Protection Tab
  • Select Create at the bottom
  • Type in a name i.e. Clean
  • Select Create
Now we can purge the infected ones
  • GoStart > All programs > Accessories > system tools
  • Right click Disc cleanup and select run as administrator
  • Select Your main drive and accept the warning if you get one
  • For a few moments the system will make some calculations
  • Select the More Options tab
  • In the System Restore and Shadow Backups select Clean up
  • Select Delete on the pop up
  • Select OK
  • Select Delete
Now that you are clean, to help protect your computer in the future I recommend that you get the following free programmes:

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
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:

Offline JackSession

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Re: Win32 downloader -pku frequent alerts
« Reply #9 on: July 24, 2012, 07:50:26 PM »
I appear to be having the same issues. I didnt want to run the fix without checking with you first. I am running Windows XP 5.1 SP3 with FF v12. The ads are trying to pop using IE though. I have attached the errors I am getting - the IPs of the sites Malwarebytes are blocking are rotating among like 5-6. Please let me know how to proceed.

Thanks!!
Jack

Offline Pondus

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Re: Win32 downloader -pku frequent alerts
« Reply #10 on: July 24, 2012, 07:54:46 PM »
I appear to be having the same issues. I didnt want to run the fix without checking with you first. I am running Windows XP 5.1 SP3 with FF v12. The ads are trying to pop using IE though. I have attached the errors I am getting - the IPs of the sites Malwarebytes are blocking are rotating among like 5-6. Please let me know how to proceed.

Thanks!!
Jack
do not run fix made for others as it is unique for every machine, so it can damage yours if you run it. thats why every fix start with a warning
start your own topic and attach the logs requested


« Last Edit: July 24, 2012, 08:02:47 PM by Pondus »
Chief Wiggum: Uh, no, you got the wrong number. This is 9-1…2.


 

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