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i have a virus Ramnit on my computer


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#1 burdynam

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Posted 19 January 2012 - 11:12 AM

hi there,i'm new here,and i really need help!!!i fond with avast something like 4600files infected!!!so i've been to internet trying to understand what's going on. I read this conversation between blind faith and revgam because i thought it was exactly what i needed, and i think it was...this it what exactly i've done:

"Please download Malwarebytes Anti-Malware and save it to your desktop.
•Important!! When you save the mbam-setup file, rename it to something random (such as 123abc.exe) before beginning the download.

Malwarebytes 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.


•Make sure you are connected to the Internet and double-click on the renamed file to install the application.
For instructions with screenshots, please refer to this Guide.

•When the installation begins, follow the prompts and do not make any changes to default settings.

•Malwarebytes will automatically start and you will be asked to update the program before performing a scan.

•If an update is found, the program will automatically update itself. Press the OK button and continue.

•If you encounter any problems while downloading the definition updates, manually download them from here and just double-click on mbam-rules.exe to install.


•Under the Scanner tab, make sure the "Perform Quick Scan" option is selected.

•Click on the Scan button.

•When finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".

•Click OK to close the message box, then click the Show Results button to see a list of any malware that was found.

•Make sure that everything is checked and then click Remove Selected.

•When removal is completed, a log report will open in Notepad.

•The log is automatically saved and can be viewed by clicking the Logs tab.

•Copy and paste the contents of that report in your next reply. Be sure to post the complete log to include the top portion which shows the database version and your operating system.

•Exit Malwarebytes when done.
Note: If Malwarebytes encounters a file that is difficult to remove, you will be asked to reboot your computer so it can proceed with the disinfection process. If asked to restart the computer, please do so immediately. Failure to reboot normally will prevent Malwarebytes from removing all the malware.


so when i've done that, Malwarebytes asked me to restart the computer, and i've done immediately.now i send you the report wich is in french!!!!i'm sorry!i can do some translation if you need

Malwarebytes Anti-Malware (Essai) 1.60.0.1800
www.malwarebytes.org

Version de la base de données: v2012.01.19.01

Windows XP Service Pack 3 x86 NTFS
Internet Explorer 8.0.6001.18702
ju :: PACKARD-875B969 [administrateur]

Protection: Activé

19/01/2012 22:45:21
mbam-log-2012-01-19 (22-45-21).txt

Type d'examen: Examen rapide
Options d'examen activées: Mémoire | Démarrage | Registre | Système de fichiers | Heuristique/Extra | Heuristique/Shuriken | PUP | PUM
Options d'examen désactivées: P2P
Elément(s) analysé(s): 178689
Temps écoulé: 19 minute(s), 46 seconde(s)

Processus mémoire détecté(s): 0
(Aucun élément nuisible détecté)

Module(s) mémoire détecté(s): 0
(Aucun élément nuisible détecté)

Clé(s) du Registre détectée(s): 0
(Aucun élément nuisible détecté)

Valeur(s) du Registre détectée(s): 0
(Aucun élément nuisible détecté)

Elément(s) de données du Registre détecté(s): 0
(Aucun élément nuisible détecté)

Dossier(s) détecté(s): 1
C:\RESTORE\S-1-5-21-1482476501-1644491937-682003330-1013 (Backdoor.IRCBot) -> Mis en quarantaine et supprimé avec succès.

Fichier(s) détecté(s): 4
C:\Documents and Settings\Default User\Local Settings\Temp\{F54AC413-D2C6-4A24-B324-370C223C6250}\adobe_caps.dll (Virus.Ramnit) -> Mis en quarantaine et supprimé avec succès.
C:\Documents and Settings\ju\Local Settings\Temp\swtlib-32\swt-gdip-win32-3550.dll (Virus.Ramnit) -> Mis en quarantaine et supprimé avec succès.
C:\Documents and Settings\ju\Local Settings\Temp\swtlib-32\swt-win32-3550.dll (Virus.Ramnit) -> Mis en quarantaine et supprimé avec succès.
C:\RESTORE\S-1-5-21-1482476501-1644491937-682003330-1013\Desktop.ini (Backdoor.IRCBot) -> Mis en quarantaine et supprimé avec succès.

(fin)

and the other one

2012/01/19 22:44:19 +0800 PACKARD-875B969 ju MESSAGE Starting protection
2012/01/19 22:44:29 +0800 PACKARD-875B969 ju MESSAGE Protection started successfully
2012/01/19 22:44:29 +0800 PACKARD-875B969 ju MESSAGE Executing scheduled update: Daily
2012/01/19 22:44:32 +0800 PACKARD-875B969 ju MESSAGE Starting IP protection
2012/01/19 22:44:32 +0800 PACKARD-875B969 ju MESSAGE Database already up-to-date
2012/01/19 22:44:51 +0800 PACKARD-875B969 ju MESSAGE IP Protection started successfully
2012/01/19 23:08:07 +0800 PACKARD-875B969 ju MESSAGE Starting protection
2012/01/19 23:08:22 +0800 PACKARD-875B969 ju MESSAGE Protection started successfully
2012/01/19 23:08:25 +0800 PACKARD-875B969 ju MESSAGE Starting IP protection
2012/01/19 23:08:39 +0800 PACKARD-875B969 ju MESSAGE IP Protection started successfully


so now i don't know if it's ok or not, but i can still see the virus names in quarantine.what is next?do I still let working Malwarebytes or Avast?
thank for you help.

jumeg

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#2 boopme

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Posted 19 January 2012 - 11:38 AM

I'm afraid I have very bad news.

Your system is infected with a nasty variant of Virut, a dangerous polymorphic file infector with IRCBot functionality which infects .exe, .scr files, and opens a back door that compromises your computer. Using this backdoor, a remote attacker can access and instruct the infected computer to download and execute more malicious files.

-- Note: As with most malware infections, the threat name may be different depending on the anti-virus or anti-malware program which detected it. Each security vendor uses their own naming conventions to identify various types of malware.With this particular infection, the safest solution and only sure way to remove it effectively is to reformat and reinstall the OS.

Why? According to this Norman White Paper Assessment of W32/Virut, some variants can infect the HOSTS file and block access to security related web sites. Other variants of virut can even penetrate and infect .exe files within compressed files (.zip, .cab, rar). The Virux and Win32/Virut.17408 variants are an even more complex file infectors which can embed an iframe into the body of web-related files and infect script files (.php, .asp, .htm, .html, .xml). When Virut creates infected files, it also creates non-functional files that are corrupted beyond repair and in some instances can disable Windows File Protection. In many cases the infected files cannot be disinfected properly by your anti-virus. When disinfection is attempted, the files become corrupted and the system may become irreparable. The longer virut remains on a computer, the more critical system files will become infected and corrupt so the degree of damage can vary.

The virus disables Windows File Protection by injecting code into the "winlogon.exe" process that patches system code in memory.

CA Virus detail 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.

McAfee Risk Assessment and 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.

AVG Overview of W32/Virut

Virut is commonly spread via a flash drive (usb, pen, thumb, jump) infection using RUNDLL32.EXE and other malicious files. It is often contracted by visiting remote, crack and keygen sites. These type of sites are infested with a smörgåsbord of malware and a major source of system infection.

...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...

Keygen and Crack Sites Distribute VIRUX and FakeAV

However, the CA Security Advisor Research Blog have found MySpace user pages carrying the malicious Virut URL. Either way you can end up with a computer system so badly damaged that recovery is not possible and it cannot be repaired. When that happens there is nothing you can do besides reformatting and reinstalling the OS.

Since virut is not effectively disinfectable, your best option is to perform a full reformat as there is no guarantee this infection can be completely removed. In most instances it may have caused so much damage to your system files that it cannot be completely cleaned or repaired. In many cases the infected files (which could number in the thousands) cannot be deleted and anti-malware scanners cannot disinfect them properly. Security vendors that claim to be able to remove file infectors cannot guarantee that all traces of it will be removed as they may not find all the remnants. If something goes awry during the malware removal process there is always a risk the computer may become unstable or unbootable and you could loose access to all your data.

Further, your machine has likely been compromised by the backdoor Trojan and there is no way to be sure the computer can ever be trusted again. It is dangerous and incorrect to assume the computer is secure even if your anti-virus reports that the malware appears to have been removed.

Many experts in the security community believe that once infected with this type of malware, the best course of action is to reformat and reinstall the OS. Reinstalling Windows without first wiping the entire hard drive with a repartition and/or format will not remove the infection. The reinstall will only overwrite the Windows files. Any malware on the system will still be there afterwards. Please read:

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

Backdoors and What They Mean to You

This is what security expert miekiemoes has to say: Virut and other File infectors - Throwing in the Towel?

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.


This is what Jesper M. Johansson at Microsoft TechNet has to say: Help: I Got Hacked. Now What Do I Do?.

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).


How do I get help? Who is helping me?For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear....Become a BleepingComputer fan: Facebook




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