When you hear the world Trojan two associations probably pop immediately – the Trojan horse from greek mythology and the world virus.
A computer Trojan generally shares similarity to the horse and is definitely associated with viruses, but it is not one and the same with them. Enter Duuzer Backdoor Trojan – a typical Trojan software. Trojans are not viruses, but the backdoors other viruses use to infect your computer.
Duuzer Backdoor Trojan is the rat’s hole you need to plug before the rodents can infect your machine
A computer system is set in such a way that processes need to be authorized by the human user at least once before then can operate on your machine. Some programs that are authorized like this also get to make authorizations of their own – and that’s pretty much what the Trojan is doing.
Alternatively a Trojan will exploit some system flaw or vulnerability discovered. Adobe Flash and Internet Explorer (at least the older version) are two programs that are present on all Windows-based systems and are also notoriously bad with security, In fact Adobe Flash has long been known as the swiss cheese of software and a huge security threat. There is an active movement dedicated to phase out Adobe Flash out of the PC world and it is also getting disabled on most popular browsers like Chrome or Firefox. Unfortunately a lot of content on the Web is written in Flash and this process will be a slow and painful one.
Regardless of the method deployed a Trojan is able to download AND install software without your knowledge.
Duuzer Backdoor Trojan – how did it come in
Trojans are most commonly installed via the help of corrupted executable files. A corrupt executable file is potentially any file that does not come straight from the official developer of the program that the executable is impersonating. Of course not all such .exe files are dangerous, but many are. The most dangerous places to download a file from are:
- Email attachments. Almost certainly you are looking at a virus or Trojan. Fortunately also easy to recognize.
- Warez sites trading in illegal goods. You can’t really go to the authorities and complain how your computer got infected, can you?
- Torrent and online storage sites – with the amount of traffic on these sites it is very hard to spot an infected file before it has been downloaded to at least a few hundred computers.
- By downloading random files from online advertisements. Not all Ads are healthy – some are outright malicious and will install Trojans on your computer if you try to download the “free” programs they offer.
- By clicking on a fake download button on a site that download an executable file named exactly like a file you may be searching for. Such copy-cat sites pop regularly and their only purpose is to mirror search queries in order to deliver 100% match results and then offer you an infected file to download.
The main rule is to avoid these dangerous sources, but that is not always possible. Should you have to use such a source make sure you have a scanner ready on your computer. We strongly recommend the piece of software you’ll find below. The virus and malware definition charts are updated daily and it is one of the best ways to catch and remove Trojans like Duuzer Backdoor Trojan before they bring something truly dangerous to your PC. The fact you have Duuzer Backdoor Trojan installed almost certainly also means that there is at least one piece of Spyware on your machine alongside Duuzer Backdoor Trojan.
Remove Duuzer Backdoor Trojan
Our first step here is a reboot in Safe Mode. If you already know how to do it, just skip this and proceed to Step 2. If you do not know how to do it, continue reading:
For Windows 98, XP, Millenium and 7 Users:
Restart your computer. To be sure you don’t miss the time when you need to press it, just spam F8 as soon as the PC starts booting. In the new menu, choose Safe Mode With Networking.
Proceed to Step 2.
For W. 8 and 8.1 Users:
Click the Start button ,then Control Panel —> System and Security —> Administrative Tools —> System Configuration.
Then check the Safe Boot option and click OK. Click Restart in the new pop-up.
Proceed to Step 2.
For Windows 10 Users:
- Open the Start menu.
- Click the power button icon in the right corner of the new Start menu to show the power options menu.
- Press and hold down the SHIFT key on the keyboard and click the Restart option while still holding down the SHIFT key.
Windows 10 will perform the reboot. Next do the following:
Click the Troubleshoot icon, then Advanced options —> Startup Settings. Click Restart.
After the reboot click on Enter Safe Mode With Networking (Fifth Option).
Continue with Step 2.
To remove parasite on your own, you may have to meddle with system files and registries. If you were to do this, you need to be extremely careful, because you may damage your system.
If you want to avoid the risk, we recommend downloading SpyHunter - a professional malware removal tool - to see whether it will find malicious programs on your PC.
Hold the Windows Key and R and copy + paste the following, then click OK:
A .txt file will open – don’t touch anything there. If you are hacked and someone has access to your PC, there will be a bunch of other IPs connected to you at the bottom. This is what a hosts file looks like:
If there are a bunch of strange IPs connecting to you below “Localhost” you may be hacked, and it’s best to ask us in the comments for directions.
Now hold the windows Key and R again but type %temp% in the field and hit enter. Delete everything in that directory.
Right click on each of the malware processes separately and select Open File Location. Also, End the process after you open the folder. Just to make sure we don’t delete any programs you mistakenly took for a malware, copy the folders somewhere, then delete the directories you were sent to. There’s a good chance Duuzer Backdoor Trojan is hiding somewhere in here.
A BIG WARNING HERE! READ THIS BEFORE PROCEEDING!
This is perhaps the most important and difficult step, so be extremely careful. Doing this can damage your PC significantly if you make a big mistake. If you are not feeling comfortable, we advise you to download a professional Duuzer Backdoor Trojan remover. Additionally, accounts connected to your credit cards, or important information, may be exposed to the virus.
Take a look at the following things:
Type msconfig in the search field and hit enter: you will be transported to a new window.
Go in the Startup tab and Uncheck anything that has “Unknown” as Manufacturer.
Type Regedit in the windows search field and press Enter.
Once inside, press CTRL and F together and type the malware’s Name. Right click and delete any entries you find with a similar name. If you can’t find them this way, look in these directories, and delete the registries manually:
- HKEY_CURRENT_USER—-Software—–Random Directory. It could be any one of them – ask us if you can’t discern which ones are malicious, but bear in mind they are always different.
HKEY_CURRENT_USER—-Software—Microsoft—Internet Explorer—-Main—- Random
If these things fail to help you find Duuzer Backdoor Trojan you need to resort to a professional scanner – obviously this is a malware that was created to steal your credentials and credit cards – meaning the people who created it spent a lot of resources to make it as dangerous as possible.
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