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RootKits


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#1 Ganesha

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Posted 25 September 2009 - 09:14 AM

I was reading about rootkits and it appears that it is capable of creating havoc to your system and your financial data if a hacker gets your information.

I have a desktop and three laptops connected through a router. One of the laptops seems to be infected and looking at the symptoms it might be a rootkit. One of the moderators is helping me getting rid of it.

Can someone tell me what the dangers are to my other two laptops and desktop with this infection in one of the laptops? Should I be disconnecting from the Internet in all the computers ?

Thanks for your help.

Edited by Ganesha, 25 September 2009 - 09:15 AM.


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#2 garmanma

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Posted 25 September 2009 - 09:31 AM

It's a definite rootkit infection
It would be wise to isolate the computer from the rest
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#3 Ganesha

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Posted 25 September 2009 - 09:46 AM

Thanks garmanma. You have been very helpful.

#4 quietman7

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Posted 28 September 2009 - 07:53 AM

Rootkits, backdoor Trojans, Botnets, and IRCBots are very dangerous because they compromise system integrity by making changes that allow it to by used by the attacker for malicious purposes. Rootkits are used by Trojans to conceal its presence (hide from view) in order to prevent detection of an attacker's software and make removal more difficult. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. They can disable your anti-virus and security tools to prevent detection and removal. Remote attackers use backdoors as a means of accessing and taking control of a computer that bypasses security mechanisms. This type of exploit allows them to steal sensitive information like passwords, personal and financial data which is send back to the hacker. To learn more about these types of infections, you can refer to:If your computer was used for online banking, has credit card information or other sensitive data on it, you should stay disconnected from the Internet until your system is fully cleaned. All passwords should be changed immediately to include those used for banking, email, eBay, paypal and online forums. You should consider them to be compromised and change each password using a clean computer, not the infected one. If not, an attacker may get the new passwords and transaction information. If using a router, you need to reset it with a strong logon/password so the malware cannot gain control before connect again. Banking and credit card institutions should be notified of the possible security breach. Because your computer was compromised please read:Although the infection has been identified and may be removed, your PC has likely been compromised 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 the malware appears to have been removed. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired so you can never be sure that you have completely removed a rootkit. The malware may leave so many remnants behind that security tools cannot find them. Tools that claim to be able to remove rootkits cannot guarantee that all traces of it will be removed. Many experts in the security community believe that once infected with this type of malware, the best course of action is to wipe the drive clean, reformat and reinstall the OS. Please read:
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#5 samlongchef

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Posted 29 September 2009 - 07:28 AM

Quietman, I'm sold. I've rebuilt several times, and this thing keeps coming back. My network, from the outside in, consists of a wireless pass-through (internet service provider Westell Wireless Modem), an SMC barricade, a Linksys Wireless N610 Router. I'm no computer genius, but have to believe that these devices are not the source of the reinfection.

I'm running a paid version of AVG Business Network Security 8.5 with Firewall.

I've attempted "fixing" the master boot volume and records, formatted the hard drive, etc., on previous rebuilds. How do I insure a CLEAN install?!?


Many thanks in advance! sam

#6 quietman7

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Posted 29 September 2009 - 07:41 AM

If you're not sure how to reformat or need help with reformatting, please review:These links include step-by-step instructions with screenshots:Vista users can refer to these instructions:Don't forget you will have to go to Microsoft Update and apply all Windows security patches after reformatting.

Note: If you're using an IBM, Sony, HP, Compaq, Toshiba or Dell machine, you may not have an original XP CD Disk. By policy Microsoft no longer allows OEM manufactures to include the original Windows XP CD-ROM on computers sold with Windows preinstalled. Instead, most computers manufactured and sold by OEM vendors come with a vendor-specific Recovery Disk or Recovery Partition for performing a clean "factory restore" that will reformat your hard drive, remove all data and restore the computer to the state it was in when you first purchased it. See Technology Advisory Recovery Media. If the recovery partition has become infected, you will need to contact the manufacturer, explain what happened and ask them to send full recovery disks to use instead..

Reformatting a hard disk deletes all data. If you are reformatting or doing a factory restore due to malware infection, you can back up all your important documents, personal data files, photos to a CD or DVD drive, not a flash drive or external hard drive as they may become compromised in the process. The safest practice is not to backup any executable files (*.exe), screensavers (*.scr), autorun (.ini) or script files (.php, .asp, .htm, .html, .xml ) files because they may be infected by malware. Avoid backing up compressed files (.zip, .cab, .rar) that have executable files inside them as some types of malware can penetrate and infect .exe files within compressed files too. Other types of malware may even disguise itself by adding and hiding its extension to the existing extension of file(s) so be sure you look closely at the full file name. After reformatting, scan the backed up data with your anti-virus prior to to copying it back to your hard drive.

If your CD/DVD drive is unusable, another word of caution if you are considering backing up to an external usb hard drive as your only alternative. External drives are more susceptible to infection and can become compromised in the process of backing up data. I'm not saying you should not try using such devices but I want to make you aware of all your options and associated risks so you can make an informed decision if its worth that risk.

Again, do not back up any data with the following file extensions: exe, .scr, .ini, .htm, .html, .php, .asp, .xml, .zip, .rar, .cab as they may be infected.

If you need additional assistance with reformatting or partitioning, you can start a new topic in the Windows XP Home and Professional forum.
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