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Hldrrr.exe Trojan


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#1 zombiegirl

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Posted 20 September 2008 - 11:21 PM

I have an hldrrr.exe trojan in my computer.

I am running Vista Home Premium. Initially, I thought that the Norton antivirus program had been corrupted in some way, so I uninstalled it. I then tried to install AVG antivirus and it would not install. I did manage to install CA Security Suite, but the program is not functioning properly and will not scan for viruses. Wintems.exe and hldrrr.exe were trying access the internet through CA Firewall, so I denied access. Because the firewall asked for something in the system32 folder to have access to the internet, I became suspicious and did a google search for hldrrr.exe and found that several other people have gotten this trojan. I also searched for tips on how to remove hldrrr.exe and read about a rootkit remover. I tried several rootkit removers and got one to work and used it to remove wintems.exe and hldrrr.exe in safe mode. After rebooting my computer, I started up the rootkit remover again and scanned the system32 folder. The virus was still there, it came back because there were other files related to it still in the system. I then searched on google for associated files and deleted what I could find on my computer, and the virus still came back anyway. Can someone please tell me how to get rid of this trojan?

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#2 DaChew

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Posted 20 September 2008 - 11:43 PM

I ran into a couple of posts with google where the rootkit infects IE toolbars so that when IE is opened the rootkit is reinstalled and the trojan also.
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#3 zombiegirl

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Posted 23 September 2008 - 10:49 PM

I ran into a couple of posts with google where the rootkit infects IE toolbars so that when IE is opened the rootkit is reinstalled and the trojan also.


Thank you for the tip. Most of the time I use Firefox. Have you heard of anything like this happening with Mozilla?

#4 DaChew

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Posted 23 September 2008 - 11:06 PM

http://www.bleepingcomputer.com/forums/ind...mp;#entry944365

let's see if you can get MBAM to run

MBAM may make changes to your registry as part of its disinfection routine. If you're using other security programs that detect registry changes, they may alert you after scanning with MBAM. Please permit the program to allow the changes.


We might have to straighten all this antivirus mess out first tho
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#5 quietman7

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Posted 24 September 2008 - 11:44 AM

hldrrr.exe adds a hidden service called srosa.sys which is related to W32/Bagle and a nasty rootkit component that is difficult to remove. Rootkits and backdoor Trojans are very dangerous because they use advanced techniques (backdoors) as a means of accessing a computer system that bypasses security mechanisms and steal sensitive information which they send back to the hacker. Many rootkits can hook into the Windows 32-bit kernel, and patch several APIs to hide new registry keys and files they install. Remote attackers use backdoor Trojans and rootkits as part of an exploit to gain unauthorized access to a computer and take control of it without your knowledge.

If your computer was used for online banking, has credit card information or other sensitive data on it, you should immediately disconnect from the Internet until your system is 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. You should change each password by using a different computer and 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 How Do I Handle Possible Identify Theft, Internet Fraud and CC Fraud?

Although the rootkit 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 that because this malware has been removed the computer is now secure. In some instances an infection may have caused so much damage to your system that it cannot be completely cleaned or repaired. The malware may leave so many remnants behind that security tools cannot find them. 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:

"When should I re-format? How should I reinstall?"
"Help: I Got Hacked. Now What Do I Do?"
"Where to draw the line? When to recommend a format and reinstall?"
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