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Posted 30 December 2010 - 11:55 PM
Posted 31 December 2010 - 04:42 PM
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 03 January 2011 - 01:49 PM
Avira: Cleaning polymorphic infected files
...In many cases, files cannot simply be deleted as this would affect the stability or even basic functionality of the operating system and other software. Instead, the infected host program must be disinfected by removing the virus code from it and by carefully restoring the original contents and file structure if possible. This means detection and removal are still an issue for antivirus software....
avast: a file infector and why we cannot give false hope!
...for infected users we have to offer no hope - fdisk - format and re-install is the only solution open to them...
McAfee: polymorphic infector
...it injects its code into running processes...The virus has a number of bugs in its code, and as a result it may misinfect a proportion of executable files...unfortunately, some infections are corrupted beyond repair.
Norton (Symantec): File infector
The suggestions in this article are not intended to 100% guarantee removal of all threats...The file infector employs a technique to make sure its corrupted .DLL format will replace the targeted entensions found within the system. When the computer is rebooted it incidentally boots the infected file and continues its advancement throughtout the system...
AVG: polymorphic infector
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...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.
Kaspersky: file infector
...you can try via rescue cd, or slave mounted hard drive. but there's no guarantee that some files won't get corrupted through the disinfection process.
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