Remove Win32/Delf.NRJ Trojan Totally from Your PC - How to, Technology and PC Security Forum |

Remove Win32/Delf.NRJ Trojan Totally from Your PC

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Win32/Delf.NRJ is a Trojan horse written in the Delphi programming language. The Trojan opens a backdoor on a compromised computer and may steal data, perform DDoS attacks or run executable files.

TypeTrojan, Backdoor
Short DescriptionThe Trojan opens a backdoor. The backdoor can give unauthorized, remote access to a computer to a hacker.
SymptomsThrough the backdoor, a hacker may steal data, may perform Denial of Service attacks or run executables.
Distribution MethodTargeted Attacks, Email Attachments
Detection ToolDownload Malware Removal Tool, to See If Your System Has Been Affected by Win32/Delf.NRJ
User Experience Join our forum to discuss Win32/Delf.NRJ.

Win32/Delf.NRJ Trojan – Distribution Methods

One method of getting infected with the Win32/Delf.NRJ Trojan horse is by installing it manually as software pretending to be useful. So, without knowing, you are getting the Trojan injected into your computer, instead. Another distribution method spreading the infection is via browser exploits, such as plugins, extensions, or suspicious sites with malicious code inside them.

You may get infected with the Trojan from a targeted attack by downloading an attachment from an email. Files that can be used to distribute Trojans like Win32/Delf.NRJ, usually have these extensions: .bat, .exe, .vbs, .pif, .scr.

Win32/Delf.NRJ Trojan – In Detail

Win32/Delf.NRJ is classified as a Trojan horse. It is written in the Delphi programming language. It has the potential to infect your computer with more malware as it opens a backdoor on it. From that backdoor, a hacker gains access from a remote location.

According to researchers, once the Trojan is executed it starts searching for .exe files and when it finds any such files, it begins renaming them. It usually puts the letter G in front of those files:

Image Source: Microsoft

After these operations, the Trojan will modify Windows Firewall settings, and connect remotely to a URL address. It uses the UDP, HTTP protocol to do so.

Via that backdoor, the Win32/Delf.NRJ Trojan may perform a number of malicious actions. Actions such as: moving, reading, executing, downloading, creating, deleting, and copying files; enumerating running processes. The Trojan can also perform DDoS attacks, open specific URLs in your browsers and also run various executable files which might contain malicious code.

The Win32/Delf.NRJ Trojan is dubbed like that by ESET researchers, and the name has gained popularity. But it also has the following other aliases:

  • Backdoor.Win32.Delf.mrx (dubbed by Kaspersky)
  • W32/Renamer-K (dubbed by Sophos)
  • Backdoor.Win32/Grenam.A (dubbed by Microsoft)

Via the connection to the remote locations, the hacker behind the Trojan may also steal sensitive data and files.

Remove Win32/Delf.NRJ Trojan Completely

This Trojan can spy on you, access personal information on your PC and may infect you with different malware eventually. It may track your personal information and send all that to hackers, from which they can profit. To completely get rid of the Win32/Delf.NRJ Trojan horse from your PC, carefully follow the step-by-step removal instructions provided below.

1. Boot Your PC In Safe Mode to isolate and remove Win32/Delf.NRJ
2. Remove Win32/Delf.NRJ with SpyHunter Anti-Malware Tool
3. Remove Win32/Delf.NRJ with Malwarebytes Anti-Malware.
4. Remove Win32/Delf.NRJ with STOPZilla AntiMalware
5. Back up your data to secure it against infections by Win32/Delf.NRJ in the future
NOTE! Substantial notification about the Win32/Delf.NRJ threat: Manual removal of Win32/Delf.NRJ requires interference with system files and registries. Thus, it can cause damage to your PC. Even if your computer skills are not at a professional level, don’t worry. You can do the removal yourself just in 5 minutes, using a malware removal tool.

Berta Bilbao

Berta is a dedicated malware researcher, dreaming for a more secure cyber space. Her fascination with IT security began a few years ago when a malware locked her out of her own computer.

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  1. AvatarJosue

    Hola Berta, me he infectado con este virus, he pasado el Nod32 y lo ha detectado y eliminado, pero, resulta que tengo el problema de tener cientos de .exe ocultos y con la letra g delante. Qué herramienta me recomiendas para poder restablecer toda mi computadora a su estado normal ya que estas soluciones que das en el post pues lo que hacen es eliminarlo. Saludos!

    1. AvatarMilena Dimitrova

      Hi Josue,

      Can you tell us more about these .exe files? Why do you think they are infected or malicious?


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