Exterminate It! Antimalware


Known threats:700,085 Last Update:March 01, 12:55


Thank you for the note. I have been a TrendMicro client for the last few years and was impressed with the speed of Exterminate It’s scan. I appreciate the efforts to help rid my system of Vundo, the commitment to stand behind your guarantee (unfortunately that is a rarity these days) and the customer service you have offered. I wish you and the company the best.

Barry B.


Aliases of Master (AKA):

[Kaspersky]Backdoor.Delf.dd, Backdoor.MasterU, Backdoor.VB.ln
[Panda]Backdoor Program, Bck/Delf, Bck/MasterU, Backdoor Program.LC
[CA]Backdoor/Delf.dd!Server, Backdoor/MasterU!Server, Backdoor/VB.LN!Server

How to Remove Master from Your Computer^

To completely purge Master from your computer, you need to delete the files and folders associated with Master. These files and folders are respectively listed in the Files and Folders sections on this page.

For instructions on deleting the Master files and folders, see the following section How to Delete Master Files (.exe, .dll, etc.).

How to Delete Master Files (.exe, .dll, etc.)^

The files and folders associated with Master are listed in the Files and Folders sections on this page.

To delete the Master files and folders:

  1. Using your file explorer, browse to each file and folder listed in the Folders and Files sections.
  2. Note: The paths use certain special folders (conventions) such as [%PROGRAM_FILES%]. Please note that these conventions are depending on Windows Version / Language. These conventions are explained here.
  3. Select the file or folder and press SHIFT+Delete on the keyboard.
  4. Click Yes in the confirm deletion dialog box.
  5. IMPORTANT: If a file is locked (in use by some application), its deletion will fail (the Windows will display a corresponding message).You can delete such locked files with the RemoveOnReboot utility. To delete a locked file, right-click on the file, select Send To->Remove on Next Reboot on the menu and restart your computer. You can install the RemoveOnReboot utility from here.


Of all trojans, backdoor trojans pose the greatest danger to users’ PCs because they give their authors remote control over infected computers. They are downloaded, installed, and run silently, without the user’s consent or knowledge. Upon installation, backdoor trojans can be instructed to send, receive, execute and delete files, gather and transfer confidential data from the computer, log all activity on the computer, and perform other harmful activities.

Be Aware of the Following Backdoor Threats:

Split, Belang, NetDown, Bat.BatVir, Win32.Ptakks.C!Trojan.


Remote Access Tool. A program that enables a hacker to remotely access and control other people’s computers. A RAT can serve a variety of malicious purposes, including hijacking and transferring private information, downloading files, running programs, and tampering with system settings.

Be Aware of the Following RAT Threats:

Genue, WebCompiler, Fox, Penrox, IC.Manage.

Hacker Tool

Hacker tools are utilities designed to help hackers gain control of remote computers in order to use them as zombies (in DoS attacks, for example), download other malicious programs into those computers, or use them for other malicious purposes.

Be Aware of the Following Hacker Tool Threats:

Bundy, PsychoFiles, Biffit, CGIBomb, PWS.Zhengtu.

How Did My PC Get Infected with Master?^

The following are the most likely reasons why your computer got infected with Master:

  • Your operating system and Web browser's security settings are too lax.
  • You are not following safe Internet surfing and PC practices.

Downloading and Installing Freeware or Shareware

Small-charge or free software applications may come bundled with spyware, adware, or programs like Master. Sometimes adware is attached to free software to enable the developers to cover the overhead involved in created the software. Spyware frequently piggybacks on free software into your computer to damage it and steal valuable private information.

Using Peer-to-Peer Software

The use of peer-to-peer (P2P) programs or other applications using a shared network exposes your system to the risk of unwittingly downloading infected files, including malicious programs like Master.

Visiting Questionable Web Sites

When you visit sites with dubious or objectionable content, trojans-including Master, spyware and adware, may well be automatically downloaded and installed onto your computer.

Detecting Master^

The following symptoms signal that your computer is very likely to be infected with Master:

PC is working very slowly

Master can seriously slow down your computer. If your PC takes a lot longer than normal to restart or your Internet connection is extremely slow, your computer may well be infected with Master.

New desktop shortcuts have appeared or the home page has changed

Master can tamper with your Internet settings or redirect your default home page to unwanted web sites. Master may even add new shortcuts to your PC desktop.

Annoying popups keep appearing on your PC

Master may swamp your computer with pestering popup ads, even when you're not connected to the Internet, while secretly tracking your browsing habits and gathering your personal information.

E-mails that you didn't write are being sent from your mailbox

Master may gain complete control of your mailbox to generate and send e-mail with virus attachments, e-mail hoaxes, spam and other types of unsolicited e-mail to other people.