| Name | W32.Mydoom.E |
| Type | Worm Backdoor |
| Short Description | May have trojan.downloader functions. Could perform DDoS attacks and might open undefended ports. |
| Symptoms | Slow PC, Opened ports, Unusually high network utilization without any logical reason. |
| Distribution Method | Spam Mail. |
| Detection tool | Download Malware Removal Tool, to See If Your System Has Been Affected By W32.Mydoom.E |
W32.Mydoom.E is a dangerous worm that may open a backdoor to the affected PC and download and execute malicious files, making it completely defenseless. It is a variant of the infamous W32.Mydoom worm family. The worm may open several TCP ports so that it allows the attacker sending it out to connect to the computer directly and hence gain full access to the PC and the local network it is in. The worm is also believed to perform DDoS (Denial Of Service) type of attacks in scheduled times, depending on the attackers.
W32.Mydoom.E – How Did I Get Infected?
Mydoom malware is being distributed mostly via spam email attacks. The spam mails are being distributed to both users as well as domains. According to researchers the spam mails associated with this worm may contain the following as their subjects:
→”Test;hi;hello;Mail Delivery System;Mail Transaction Failed;Server Report;Status;Error”
More to it than that the spam mail may contain different attachements, usually with a .txt document’s Windows icon on them and their file formats are believed to be one of the following:
→.bat, .cmd, .exe, .pif, .scr, or .zip
Also, researchers report that this particular worm could send out spoofed emails that resemble something or someone important or already familiar to the end user.
Here are some of the attachment names associated with this family of worms:
→”document; readme; doc ;text ;file ;data ;test ;message; body
As it is to the attached files, they may be one or more files of the following formats:”
→.htm; .txt ;.doc ;.pif ;.scr ;.exe ;.cmd ;.bat; .zip
W32.Mydoom.E – What can it Cause?
Once started running in the background undetected, the worm may begin to create .dll and .exe files in %System% %Temp% and %AppData% that contain scripts. These scripts may modify different settings, such as disabling firewall and opening several ports of the computer in order to enable the backdoor to download and run different external files.
It may also run active executable processes that contain the same names as some original Windows Processes, such as tasking.exe or svchost.exe.
However, the worm may not execute the files by its own. This is why it may ad various registry keys or values in HKEY_CLASSES_ROOT in order to make Windows Explorer to load the malicious files without any hic ups. It may also situate registry values to run commands on system startup in:
→HKEY_CURRENT_USER\Software\Microsft\Windows\CurrentVersion\Run
HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
Once it has executed it’s hazardous .exe material the worm then commands it to open several ports without the user’s consent. It can then download anything onto the infected PC. We are talking about Rootkits, Trojans, Spambots, Crypters to remain undetected on the PC for long periods of time and ofcourse Ransomware Trojans. Ransomware, such as CryptoWall 3.0 is the sole reason for over 18 million dollars lost last year in online extortion. What the viruses do is encrypt user data with strong encryption in order to extort users using deadlines for payment in return for the decryption keys.
What is more this family of Worms is famous for denial-of-service type attacks otherwise known as DDoS. In case you notice your date changed to another one there is a good chance you may soon become a victim of one. It is strongly advised to immediately extract your data from your computer so that you can ensure its safety.
Removing W32.Mydoom.E
It may not be an easy process to remove W32.Mydoom.E in case you have detected it on your computer. The software may have downloaded god knows what on your computer. This is why it is highly recommended to employ advanced anti-malware program that will make sure you remove any other threats and rootkits associated with it. In case you want to be sure you will detect any rootkits in the firmware of your computer. For satisfying results, please follow the removal instructions below:
Step 1: Start Your PC in Safe Mode to Remove W32.Mydoom.E.
Removing W32.Mydoom.E from Windows XP, Vista, 7 systems:
1. Remove all CDs and DVDs, and then Restart your PC from the “Start” menu.
2. Select one of the two options provided below:
– For PCs with a single operating system: Press “F8” repeatedly after the first boot screen shows up during the restart of your computer. In case the Windows logo appears on the screen, you have to repeat the same task again.
– For PCs with multiple operating systems: Тhe arrow keys will help you select the operating system you prefer to start in Safe Mode. Press “F8” just as described for a single operating system.
3. As the “Advanced Boot Options” screen appears, select the Safe Mode option you want using the arrow keys. As you make your selection, press “Enter“.
4. Log on to your computer using your administrator account
While your computer is in Safe Mode, the words “Safe Mode” will appear in all four corners of your screen.
Removing W32.Mydoom.E from Windows 8, 8.1 and 10 systems:
Substep 1:
Open the Start Menu
Substep 2:
Whilst holding down Shift button, click on Power and then click on Restart.
Substep 3:
After reboot, the aftermentioned menu will appear. From there you should choose Troubleshoot.
Substep 4:
You will see the Troubleshoot menu. From this menu you can choose Advanced Options.
Substep 5:
After the Advanced Options menu appears, click on Startup Settings.
Substep 6:
Click on Restart.
Substep 7:
A menu will appear upon reboot. You should choose Safe Mode by pressing its corresponding number and the machine will restart and boot into Safe Mode so you can scan for and remove W32.Mydoom.E.
Step 2: Remove W32.Mydoom.E automatically by downloading an advanced anti-malware program.
To clean your computer you should download an updated anti-malware program on a safe PC and then install it on the affected computer in offline mode. After that you should boot into safe mode and scan your computer to remove all W32.Mydoom.E associated objects.
Ventsislav Krastev
Ventsislav is a cybersecurity expert at SensorsTechForum since 2015. He has been researching, covering, helping victims with the latest malware infections plus testing and reviewing software and the newest tech developments. Having graduated Marketing as well, Ventsislav also has passion for learning new shifts and innovations in cybersecurity that become game changers. After studying Value Chain Management, Network Administration and Computer Administration of System Applications, he found his true calling within the cybersecrurity industry and is a strong believer in the education of every user towards online safety and security.
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