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Danger level 8
Type: Trojans


Trojan.Zefarch is a malicious Trojan that will cause you many computer problems. This infection is capable of infecting your Internet browser by actually adding itself as a browser helper object. One of the most dangerous elements with regard to this Trojan is that it may mess up the entire functioning of your computer system. According to our research, this threat can redirect a search page to a malicious predetermined web page. It can also take full control over your computer, change settings, create and delete registry entries, disrupt Internet connection, and even decrease the speed of the entire computer. Due to this, even if you do not notice the Trojan entering your operating system, certain sings might help you realize that it does exist. Even if you have the slightest suspicious that malware has slithered into your PC, do not hesitate to run a malware scanner, a tool that can help you identify all computer infections. Once you know all threats, you can initiate their removal. We cannot stress enough how important it is to delete Trojan.Zefarch and clean your operating system.

The devious, clandestine Trojan.Zefarch is also known as the Hiloti Trojan. This threat can infect different versions of the Windows operating system – including Windows Vista and Windows XP – using extremely deceptive tactics. If this Trojan was not installed by other threats active on your computer, it could have slithered in via infected spam email attachments, misleading ads, or malicious installers. The distributors of malicious computer infections constantly invent new ways to attack operating systems, and it is up to computer users to ensure full-time protection so that malware could not slither in easily. Once in, this Trojan creates chrome.manifest and install.rdf files in the %UserProfile%\Application Data\Mozilla\Firefox\Extensions\ folder, and _cfg.js, c.js, and overlay.xul files in %UserProfile%\Application Data\Mozilla\Firefox\Extensions\chrome\content\ folder. The Trojan copies itself to %Windir% as a DLL file with random letters in the name (e.g., svdetrxt.dll). Of course, this infection adds a registry entry to ensure it starts every time you launch Windows. This entry name is made up of random letters, and, if you remove it, the Trojan will restore it soon enough because it monitors this.

As mentioned previously, Trojan.Zefarch introduces itself as a BHO (browser helper object), and it does that by adding entries (CLIDs) to the HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects path. This is how it takes over Internet Explorer; however, Firefox users are not safe either because this Trojan can create an extension called “”, which is added to the Registry as well (HKEY_CURRENT_USER\Software\Mozilla\Firefox\Extensions\). This extension is likely to check your browsing activity, and it was found to add the “” JavaScript to your search results. This suggests that you might be exposed to compromised search results without being redirected to malicious websites. Of course, you might remain unaware of this, just like about the connection to remote servers (e.g.,; IP address In general, the strength of this Trojan is its ability to stay undercover, which is why computer users are having so much trouble removing this treat.

You have to be very careful about malicious software because it can do a lot of damage. A clandestine Trojan is extremely dangerous because it can perform malicious activity without your notice, which means that it can stay active for a long time. The longer Trojan.Zefarch remains undiscovered the more security risks you are likely to encounter. Even browsing the web can be dangerous with this infection active as it can alter the search results to potentially inject malicious, corrupted links. What is more, other infections could be infiltrated, and they could be employed to steal your identity and use it for the distribution of malware. It is imperative that you remove Trojan.Zefarch from your operating system as soon as possible, and we suggest downloading a malware detection and removal tool, SpyHunter. If you decide to clean your operating system manually, you have to make sure you are capable of deleting every single threat. The Trojan itself has plenty of files and registry keys that you need to eliminate, and this task is not as easy as it might sound to be at first.

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