Thread: syswrk.a trojan
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Old 02-12-2007, 12:35 PM   #2 (permalink)
fredmh
Analyst, Security Team ; TSF Supporter
 
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Join Date: May 2006
Location: Phila,Pa
Posts: 2,335
OS: XP


Hello bzzkarat, and welcome to TSF


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Please read this post completely before begining the fix. If there's anything that you do not understand, kindly ask your questions before proceeding.
Please ensure that there aren't any opened browsers when you are carrying out the procedures below. Save the following instructions in Notepad as this
webpage would not be available when you're carrying out the fix.



IT IS IMPORTANT THAT YOU DON'T MISS A STEP & PERFORM EVERYTHING IN THE RIGHT ORDER.

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The fixes we will use are specific to your problems and should only be used for this issue on this machine.

Please only use this topic to reply to. Do not start another thread.
If any other issues arise let me know.

The process is not instant. Please continue to review my answers until I tell you your machine is clear.
Absence of symptoms does not mean that everything is clear. So lets do this to the end!

Please make every effort to reply to my posts in a timely manner. Malware breeds malware and the longer an infection remains on a system, the more
likely additional infections will result.


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Let's run some tools and find out what needs to go and where it's hiding.


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DOWNLOADS


CLEANUP! version 4.52 – TEMP FILE CLEANING


Please download Cleanup! and install it. You will use this later.

Alternative link Cleanup Alt


*NOTE* Cleanup deletes EVERYTHING out of temporary folders and does not make backups.



AVG Anti-Spyware 7.5

I see you have this program installed. Please update its definitions as we will use it later.

  1. Double-click the icon on Desktop to launch AVG A-S 7.5
  2. On the top of the main screen click Shield
  3. Click the word active to change it to inactive
  4. On the top of the main screen click Update.
  5. Then click on Start Update. The update will start and a progress bar will show the updates being installed.
  6. I also recommend changing the "Update interval" to something more reasonable like 12 hours.




ComboFix



1. Download this file - You MUST save it to your desktop

COMBOFIX




2. Double click combofix.exe & follow the prompts.

3. When finished, it shall produce a log for you. Post that log in your next reply

Note:
Do not mouseclick combofix's window whilst it's running. That may cause it to stall

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SAFE MODE RE-BOOT

Please reboot your computer in Safe Mode by doing the following:
1) Restart your computer
2) After hearing your computer beep once during startup, but before the Windows icon appears, press F8.
3) Instead of Windows loading as normal, a menu should appear
4) Use the up arrow key to highlight Safe Mode and press Enter.
5) Login with your usual account. Make sure to close any open browsers.

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FIXES AND DELETIONS


Open HijackThis and click on 'Do a System Scan Only'. Check the following entries (If they still exist, make sure you do not miss any)

O4 - Startup: PowerReg Scheduler V3.exe
O16 - DPF: {193C772A-87BE-4B19-A7BB-445B226FE9A1} (ewidoOnlineScan Control) - http://downloads.ewido.net/ewidoOnlineScan.cab


Please remember to close all other windows, including browsers then click Fix checked.

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UNHIDE HIDDEN FILES

Go to My Computer->Tools->Folder Options->View tab:
* Under the Hidden files and folders heading, select Show hidden files and folders.
* Uncheck the Hide protected operating system files (recommended) option.
* Also make sure there is no checkmark beside Hide file extensions for known file types
* Click Yes to confirm and then click OK.

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Delete the following Files indicated in RED if they still exist.

C:\WINDOWS\system32\actskn45.ocx

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RUNNING SCANNERS


Cleanup

Open Cleanup! by double-clicking the icon on your desktop (or from the Start > All Programs menu).
Set the program up as follows:

Click "Options..."
Move the arrow down to "Custom CleanUp!"
Put a check next to the following (Make sure nothing else is checked!):
  • Empty Recycle Bins
  • Delete Cookies
  • Delete Prefetch files (if present)
  • Cleanup! All Users
  • Click on the Temporary Files tab and uncheck the box for Scan drives for files matching if it’s checked.
Click OK
Press the CleanUp! button to start the program and DO NOT reboot when prompted.


AVG Anti-Spyware 7.5
  • Run AVG A-s with it's updated definitions: (...it's important that all windows must be closed)
    This scan can take quite a while to run, so be prepared.
  • Click Scanner
  • Click on the Scan tab
  • Click Complete System Scan to begin scanning.



  • When the scan is complete click Recommended Action and change it to Quarantine (1),
  • If not click Recommended Action and choose Quarantine from the popup menu. (2)
  • At the bottom of the window click on the Apply all Actions button. (3)

When done, click the Save Scan Report button. (4) then click Save Report As and save it to your desktop.

IMPORTANT : Don't click on the "Save Scan Report" button before you did hit the "Apply all Actions" button.



Note: DO NOT USE the computer while AVG A/S is scanning. If Explorer or the Control Panel are opened some malware types will
reinfect your system or will not be cleaned properly.

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SYSTEM RE-BOOT

Reboot into Normal Mode.

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ON-LINE SCANS


Kaspersky - Extended

Establish an internet connection & perform an online scan with Internet Explorer at Kaspersky Online Scanner

Answer Yes, when prompted to install an ActiveX component.
  • The program will then begin downloading the latest definition files.
  • Once the files have been downloaded click on NEXT
  • Locate the Scan Settings button & configure to:
    • Scan using the following Anti-Virus database:
      • Extended
    • Scan Options:
      • Scan Archives
      • Scan Mail Bases
  • Click OK & have it scan My Computer
  • Once the scan is complete, it will display if your system has been infected. It does not provide an option to clean/disinfect.
    We only require a report from it.
  • Click the Save as Text button to save the file to your desktop so that you may post it in your next reply

* Turn off the real time scanner of any existing antivirus program while performing the online scan

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FOLLOW-UP

Please return and post these items in the order listed:

c:\combofix.txt
AVG A/S
Kaspersky scan
A new HJT log run in Normal Mode


Please note: In order to properly see what is on your system, all HJT logs must be run in the normal mode

Please let me know how your system is behaving.
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