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HELP! c:\Windows\system\svchost.exe (Backdoor.Bot)


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I ran MB yesterday and noticed that there was this backdoor.bot thing and then when I tried to remove it it said unable to remove. Ever since then I've been having issues with my pc. I've tried everything it seems like...Bitdefender...SUPER...ATF....and everytime after I reboot it seems like things are working but then after awhile it starts to act up again, I run MB and its still there. I also notice that when my screen saver comes on or when I shut down there is this "mini web browser" (the title) that pops up with nothing in it and just sits there. I'm not sure what to do!

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  • Staff

Hi and welcome to Malwarebytes.

I'm afraid I have bad news.

Your logs reveal a backdoor trojan. A backdoor severely compromises system integrity.

A compromised system may allow illicit network connections, disabling of security software, modifying critical system files and collection and transmiission of personal identifiable information without your consent.

I recommend that you disconnect this PC from the Internet immediately, and only reconnect to download any tools that are required. If you do any banking or other financial transactions on the PC or it if it contains any other sensitive information, please get to a known clean computer and change all passwords where applicable, and it would be wise to contact those same financial institutions to apprise them of your situation.

Though the Trojan has been identified and can be killed, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of Trojan, the best course of action would be a reformat and reinstall of the OS. If it were on my PC I would not hesitate for a moment to do so. Please read these for more information:

How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?

When Should I Format, How Should I Reinstall

Should you decide not to follow that advice, we will of course do our best to clean the computer of any infections that we can see but, as I already stated, we can in no way guarantee it to be trustworthy.

Should you have any questions, please feel free to ask.

Let me know what you decide.

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Though the Trojan has been identified and can be killed, because of it's backdoor functionality, your PC is very likely compromised and there is no way to be sure your computer can ever again be trusted. Many experts in the security community believe that once infected with this type of Trojan, the best course of action would be a reformat and reinstall of the OS. If it were on my PC I would not hesitate for a moment to do so.

I don't really have too much information on the pc. I basically use it for music, games, and school. I do check my bank account but not often. I also use it for online purchases through which I heavily use paypal. Are those considered a financial risks? The majority of my files and information I keep on external hardrives? I've disconnected them but can they also be affected by the trojan?

I would prefer to just kill it but I dont think reformatting and re-installing is a bad option either becuase of how I use the computer. Just not sure if its necessary. It's also just a cheap emachine.

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Hi,

If you do banking, even sometimes, formatting would be the best option.

Don't worry about the external hard drives. They should be safe.

Back up the data on the hard drive with Windows, then format only that hard drive and reinstall Windows on it.

Let me know how you would like to proceed.

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Hi,

If you do banking, even sometimes, formatting would be the best option.

Don't worry about the external hard drives. They should be safe.

Back up the data on the hard drive with Windows, then format only that hard drive and reinstall Windows on it.

Let me know how you would like to proceed.

I tried to do a backup the data on the hard drive but it fails each time. I was going to just proceed with the formatting but then realized that my pc did not come with any OS disks. I located where they can be purchased from online and I am waiting on their arrival.

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