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Posted 26 July 2011 - 02:10 AM
Posted 26 July 2011 - 04:24 AM
Posted 26 July 2011 - 06:14 AM
CA Virus detail of W32/Virut
The virus disables Windows File Protection by injecting code into the "winlogon.exe" process that patches system code in memory.
McAfee Risk Assessment and Overview of W32/Virut
The virus has a number of bugs in its code, and as a result it may misinfect a proportion of executable files....some W32/Virut.h infections are corrupted beyond repair.
AVG Overview of W32/Virut
There are bugs in the viral code. When the virus produces infected files, it also creates non-functional files that also contain the virus...Due to the damaged caused to files by virut it's possible to find repaired but corrupted files. They became corrupted by the incorrect writing of the viral code during the process of infection. undetected, corrupted files (possibly still containing part of the viral code) can also be found. this is caused by incorrectly written and non-function viral code present in these files.
Keygen and Crack Sites Distribute VIRUX and FakeAV
...warez and crack web pages are being used by cybercriminals as download sites for malware related to VIRUT and VIRUX. Searches for serial numbers, cracks, and even antivirus products like Trend Micro yield malcodes that come in the form of executables or self-extracting files...quick links in these sites also lead to malicious files. Ads and banners are also infection vectors...
Backdoors and What They Mean to You
Whenever a system has been compromised by a backdoor payload, it is impossible to know if or how much the backdoor has been used to affect your system...There are only a few ways to return a compromised system to a confident security configuration. These include:
• Reimaging the system
• Restoring the entire system using a full system backup from before the backdoor infection
• Reformatting and reinstalling the system
This is what Jesper M. Johansson at Microsoft TechNet has to say: Help: I Got Hacked. Now What Do I Do?.
If I guide someone with Virut (or any other File Infector) present and their Antivirus cannot properly disinfect it, then I recommend a format and reinstall...dealing with such infections is a waste of time and that's why I prefer the fastest and safest solution - which is a format and reinstall...After all, I think it would be irresponsible to let the malware "stew" (download/spread/run more malware) for another couple of days/weeks if you already know it's a lost case.
The only way to clean a compromised system is to flatten and rebuild. That’s right. If you have a system that has been completely compromised, the only thing you can do is to flatten the system (reformat the system disk) and rebuild it from scratch (reinstall Windows and your applications).
Posted 27 July 2011 - 06:23 AM
Posted 27 July 2011 - 07:00 AM
Posted 27 July 2011 - 08:36 AM
The best way to determine if Virut is still present is to upload a sample of system files (i.e. winlogon.exe, userinit.exe, lsass.exe. svchost.exe) to an online scanner (Jotti's virusscan, VirusTotal).
In the "File to upload & scan" box, click the "browse" button and locate them in the C:\WINDOWS\System32\ folder.
Click "Open", then click the "Submit" button.
If the file is listed as already analyzed, click on the Reanalyse file now button.
Then perform a scan with Eset Online Anti-virus Scanner.
- If using Mozilla Firefox, you will be prompted to download and use the ESET Smart Installer. Just double-click on esetsmartinstaller_enu.exe to install.
- Vista/Windows 7 users need to run Internet Explorer/Firefox as Administrator. To do this, right-click on the IE icon in the Start Menu or Quick Launch Bar on the Taskbar and select Run As Administrator from the context menu.
- Click the green button.
- Read the End User License Agreement and check the box:
- Check .
- Click the button.
- Accept any security warnings from your browser and allow the download/installation of any require files.
- Under scan settings, check and make sure that the option Remove found threats is NOT checked.
- Click Advanced settings and select the following:
- Scan potentially unwanted applications
- Scan for potentially unsafe applications
- Enable Anti-Stealth technology
- Click the Start button.
- ESET will install itself, download virus signature database updates, and begin scanning your computer.
- The scan will take a while so be patient and do NOT use the computer while the scan is running. Keep all other programs and windows closed.
- When the scan completes, push
- Push , and save the file to your desktop as ESETScan.txt.
- Push the button, then Finish.
- Copy and paste the contents of ESETScan.txt in your next reply. If no threats are found, there is no option to create a log.
Posted 27 July 2011 - 08:44 AM
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