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i have infected my computer. i need help


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#1 frosten

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Posted 14 August 2009 - 09:01 PM

so i downloaded an executable and ignored windows warnings. i have no excuses except that i scanned the file with avast (4.8 home edition) before opening it, like i always do.

avast showed no warnings. so i thought it was green light. only windows (xp, service pack 3) showed the untrusted source warning, which like i said, i ignored.

upon executing the file, nothing happened. this was my first clue. so i turned off the wireless and restarted the computer in safe mode. i ran avast full scan for about two hours. avast did not find anything initially.

now, that i have started in normal mode, avast detects an active trojan from time to time in my windows\system32 folder. the executable name is an arbitrary number each time. the only clue avast gives is this : Win32:Trojan-gen {Other}.

please, help.

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#2 Computer Pro

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Posted 14 August 2009 - 09:05 PM

Hello and welcome to Bleeping Computer.

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Lets take a look with Malwarebytes

Please download Malwarebytes' Anti-Malware from here:
Malwarebytes
Please rename the file BEFORE downloading to zztoy.exe instead of mbam-setup.exe

MBAM 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.

Double Click zztoy.exe to install the application.
* Make sure a checkmark is placed next to Update Malwarebytes' Anti-Malware and Launch Malwarebytes' Anti-Malware, then click Finish.
* If an update is found, it will download and install the latest version.
* Once the program has loaded, select "Perform Full Scan", then click Scan.
* The scan may take some time to finish,so please be patient.
* When the scan is complete, click OK, then Show Results to view the results.
* Make sure that everything is checked, and click Remove Selected.
* When disinfection is completed, a log will open in Notepad and you may be prompted to Restart.(See Extra Note)
* The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
* Copy&Paste the entire MBAM report (even if it does not find anything) in your next reply

Extra Note:
If MBAM encounters a file that is difficult to remove,you will be presented with 1 of 2 prompts,click OK to either and let MBAM proceed with the disinfection process, if asked to restart the computer, please do so immediately.


If Malwarebytes won't install or run

Some types of malware will disable MBAM and other security tools. If MBAM will not install, try renaming it. Right-click on the mbam-setup.exe file and change the .exe extension to .bat, .com, .pif, or .scr and then double-click on it to run.

If after installation, MBAM will not run, open the Malwarebytes' Anti-Malware folder in Program Files, right-click on mbam.exe and change the .exe as noted above. Then double-click on it to run.
Computer Pro

#3 frosten

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Posted 14 August 2009 - 10:42 PM

thanks for your fast reply.

i forgot to mention that after posting i went and downloaded the malwarebytes software, as i used it before for a vundo infection. so i was already running a full scan. i hope the renaming part is not critical.

the scan just finished and here is the report:

Malwarebytes' Anti-Malware 1.40
Database version: 2628
Windows 5.1.2600 Service Pack 3

8/14/2009 11:37:41 PM
mbam-log-2009-08-14 (23-37-41).txt

Scan type: Full Scan (C:\|)
Objects scanned: 357449
Time elapsed: 2 hour(s), 7 minute(s), 19 second(s)

Memory Processes Infected: 1
Memory Modules Infected: 0
Registry Keys Infected: 3
Registry Values Infected: 3
Registry Data Items Infected: 2
Folders Infected: 0
Files Infected: 14

Memory Processes Infected:
C:\Documents and Settings\Victor\prsf.exe (Trojan.Dropper) -> Unloaded process successfully.

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\dslcnnct (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\IProxyProvider (Trojan.Vundo) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Software Notifier (Rogue.Multiple) -> Quarantined and deleted successfully.

Registry Values Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\ehk (Trojan.Dropper) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\inhhcv5oj0eje5 (Rogue.Installer) -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\kr_done1 (Malware.Trace) -> Quarantined and deleted successfully.

Registry Data Items Infected:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Trojan.Dropper) -> Data: c:\documents and settings\victor\prsf.exe -> Quarantined and deleted successfully.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit (Hijack.Userinit) -> Bad: (C:\WINDOWS\system32\userinit.exe,C:\Documents and Settings\Victor\prsf.exe \s) Good: (Userinit.exe) -> Quarantined and deleted successfully.

Folders Infected:
(No malicious items detected)

Files Infected:
C:\Documents and Settings\Victor\prsf.exe (Trojan.Dropper) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\ehk.exe (Trojan.Dropper) -> Quarantined and deleted successfully.
c:\tmp\.tt3.tmp.exe (Rogue.Installer) -> Quarantined and deleted successfully.
C:\Documents and Settings\Victor\Local Settings\Application Data\Google\Chrome\User Data\Default\Cache\f_003276 (Trojan.Downloader) -> Quarantined and deleted successfully.
C:\tmp\.tt3.tmp (Rogue.Installer) -> Quarantined and deleted successfully.
C:\tools\rockxp4.exe (Spyware.Passwords) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\lphcc5oj0eje5.exe (Trojan.FakeAlert) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\clkcnt.txt (Trojan.Vundo) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\kr_done1 (Malware.Trace) -> Quarantined and deleted successfully.
C:\WINDOWS\system32\mcrh.tmp (Malware.Trace) -> Quarantined and deleted successfully.
C:\WINDOWS\BM8bdadd74.txt (Trojan.Vundo) -> Quarantined and deleted successfully.
C:\WINDOWS\BM8bdadd74.xml (Trojan.Vundo) -> Quarantined and deleted successfully.
C:\WINDOWS\cookies.ini (Malware.Trace) -> Quarantined and deleted successfully.
C:\WINDOWS\pskt.ini (Trojan.Vundo) -> Quarantined and deleted successfully

.

#4 Computer Pro

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Posted 14 August 2009 - 10:43 PM

Ok, next:

Please run ATF and SAS:
Credits to Boopme

Note.. SAS doesn't open the registry hives for other user accounts on the system, so scans should be done from each user account.

Note 2: On Vista, "Windows Temp" is disabled. To empty "Windows Temp" ATF-Cleaner must be "Run as an Administrator".

From your regular user account..
Download Attribune's ATF Cleaner and then SUPERAntiSpyware, Free Home Edition

Save both to desktop ..
DO NOT run yet.
Open SUPER from icon and install and Update it
Under Scanner Options make sure the following are checked (leave all others unchecked):
Close browsers before scanning.
Scan for tracking cookies.
Terminate memory threats before quarantining.
Click the "Close" button to leave the control center screen and exit the program. DO NOT run yet.

Now reboot into Safe Mode: How to enter safe mode(XP)
Using the F8 Method
Restart your computer.
When the machine first starts again it will generally list some equipment that is installed in your machine, amount of memory, hard drives installed etc. At this point you should gently tap the F8 key repeatedly until you are presented with a Windows XP Advanced Options menu.
Select the option for Safe Mode using the arrow keys.
Then press enter on your keyboard to boot into Safe Mode.

Double-click ATF-Cleaner.exe to run the program.
Under Main "Select Files to Delete" choose: Select All.
Click the Empty Selected button.

If you use Firefox or Opera browser click that browser at the top and choose: Select All
Click the Empty Selected button.
If you would like to keep your saved passwords, please click No at the prompt.
Click Exit on the Main menu to close the program.

NOW Scan with SUPER
Open from the desktop icon or the program Files list
On the left, make sure you check C:\Fixed Drive.
Perform a Complete scan. After scan,Verify they are all checked.
Click OK on the summary screen to quarantine all found items.
If asked if you want to reboot, click "Yes" and reboot normally.

To retrieve the removal information after reboot, launch SUPERAntispyware again.
Click Preferences, then click the Statistics/Logs tab.
Under Scanner Logs, double-click SUPERAntiSpyware Scan Log.
If there are several logs, click the current dated log and press View log.
A text file will open in your default text editor.
Please copy and paste the Scan Log results in your next reply.
Click Close to exit the program.
Computer Pro

#5 frosten

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Posted 15 August 2009 - 12:53 PM

hello, thanks for the continuing support.

superantispyware took a while to finish. below is the result. also, avast does not mention any active trojan on the system anymore.

SUPERAntiSpyware Scan Log
http://www.superantispyware.com

Generated 08/15/2009 at 01:23 PM

Application Version : 4.27.1002

Core Rules Database Version : 4058
Trace Rules Database Version: 1998

Scan type : Complete Scan
Total Scan Time : 03:33:25

Memory items scanned : 551
Memory threats detected : 0
Registry items scanned : 8049
Registry threats detected : 2
File items scanned : 206585
File threats detected : 0

Adware.Vundo Variant
HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\ShellExecuteHooks#{D976B84B-808C-4357-9CBB-55BF1F7CEBE7}
HKU\S-1-5-21-3120559989-3631620059-817833170-1006\Software\Microsoft\Windows\CurrentVersion\Ext\Stats\{D976B84B-808C-4357-9CBB-55BF1F7CEBE7}



#6 Computer Pro

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Posted 15 August 2009 - 01:57 PM

How are things now?
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#7 frosten

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Posted 15 August 2009 - 02:31 PM

everything is fine i think. avast hasn't shown a single warning. hope the whole day will go nicely.

#8 Computer Pro

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Posted 15 August 2009 - 03:17 PM

Ok, then if everything is fine:

Create a new Restore Point to prevent possible reinfection from an old one. Some of the malware you picked up could have been saved in System Restore. Since this is a protected directory your tools cannot access to delete these files, they sometimes can reinfect your system if you accidentally use an old restore point. Setting a new restore point AFTER cleaning your system will help prevent this and enable your computer to "roll-back" to a clean working state.

The easiest and safest way to do this is:
Go to Start > Programs > Accessories > System Tools and click "System Restore".
Choose the radio button marked "Create a Restore Point" on the first screen then click "Next". Give the R.P. a name, then click "Create". The new point will be stamped with the current date and time. Keep a log of this so you can find it easily should you need to use System Restore.
Then use Disk Cleanup to remove all but the most recently created Restore Point.
Go to Start > Run and type: Cleanmgr
Click "Ok"
Disk Cleanup will scan your files for several minutes, then open.
Click the "More Options" Tab.
Click the "Clean up" button under System Restore.
Click Ok. You will be prompted with "Are you sure you want to delete all but the most recent restore point?"
Click Yes, then click Ok.
Click Yes again when prompted with "Are you sure you want to perform these actions?"
Disk Cleanup will remove the files and close automatically.
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#9 frosten

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Posted 15 August 2009 - 04:38 PM

done. thanks a lot. i really appreciate.

#10 Computer Pro

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Posted 15 August 2009 - 05:09 PM

Your very welcome
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