Contents of this article pertain toTrojan.Crypt.UZD. This page includes description, technical aspects, and removal guide to delete the threat from your computer.
Trojan.Crypt.UZD is a deadly Trojan that will download additional malicious programs on infected computer and attempts to communicate with other systems in a network or across the Internet and transmit information. Trojan.Crypt.UZD is a detection for malicious file that were intentionally encrypted in order to hide themselves from antivirus programs.
Damage Level: Medium
Systems Affected: Windows 9x, 2000, XP, Windows Vista
When run, Trojan.Crypt.UZD will infect Windows legitimate system file “C:\\WINDOWS\system32\svchost.exe” to run itself when Windows starts. The file svchost.exe will run on every Windows start-up to check registry part that corresponds to services necessary to load. There is a possibility that multiple instances of svchost.exe are running at the same time.
Authors of Trojan.Crypt.UZD encrypt the Trojan using a packer not commonly utilized for commercial and legitimate purposes. The intention is to conceal the Trojan from antivirus detection and silently perform its tasks on target computer.
Trojan.Crypt.UZD usually spread by means of another Trojan infection. When residing on the computer, it will communicate with a remote server to download additional threat. Recent observation shows that Trojan.Crypt.UZD is used to spread a copy of rogue security software.
This Trojan only targets one legitimate system file and was not designed to infect other files inside the PC. It has no capability to compromise other computers within a network. Trojan.Crypt.UZD will not spread by any means except from online transmission.
How to Remove Trojan.Crypt.UZD
Step 1 : Run a scan with your antivirus program
1. First thing you should do is reboot the computer in Safe Mode with Networking to avoid Trojan.Crypt.UZD from loading at start-up.
Remove all media such as floppy drive, cd, dvd, and USB devices. Then, restart the computer and please do the following:
Boot in Safe Mode with Networking on Windows XP, Windows Vista, and Windows 7 system
a) Before Windows begins to load, press F8 on your keyboard.
b) It will display the Advanced Boot Options menu. Select Safe Mode with Networking.
Start computer in Safe Mode with Networking using Windows 8
a) Before Windows begins to load, press Shift and F8 on your keyboard.
b) On Recovery interface, click on 'See advanced repair options'.
c) Next, click on Troubleshoot option.
d) Then, select Advanced options from the list.
e) Lastly, please choose Windows Startup Settings and click on Restart. When Windows restarts, you will be send to a familiar Advanced Boot Options screen.
f) Select Safe Mode with Networking from the selections menu.
2. Once Windows is running under Safe Mode with Networking, open your antivirus program and download the most recent update. This method ensures that your antivirus program can detect even newer variants of Trojan.Crypt.UZD.
Updating your antivirus software is a one-click process. Please refer to your software manual for complete instructions.
3. Once updating is finished, run a full system scan. After the scan, delete all infected items. If unable to clean or delete, better place the threat in quarantine.
Step 2: Run another test with Norton Power Eraser
1. Click on the button below to download Norton Power Eraser from official web site. Save it to your desktop or any location of your choice.
4. Once the file is downloaded, navigate its location and double-click on the icon (NPE.exe) to launch the program.
5. Norton Power Eraser will run. If it prompts for End User License Agreement, please click on Accept.
6. On NPE main window, click on Advanced. We will attempt to remove Trojan.Crypt.UZD components without restarting the computer.
7. On next window, select System Scan and click on Scan now to perform standard scan on your computer.
8. NPE will proceed with the scan. It will search for Trojans, viruses, and malware like Trojan.Crypt.UZD. This may take some time, depending on the number of files currently stored on the computer.
9. When scan is complete. All detected risks are listed. Remove them and restart Windows if necessary.
Alternative Removal Methods for Trojan.Crypt.UZD
Option 1 : Use Windows System Restore to return Windows to previous state
During an infection, Trojan.Crypt.UZD drops various files and registry entries. The threat intentionally hides system files by setting options in the registry. With these rigid changes, the best solution is to return Windows to previous working state is through System Restore.
To verify if System Restore is active on your computer, please follow the instructions below to access this feature.
Access System Restore on Windows XP, Windows Vista, and Windows 7
a) Go to Start Menu, then under 'Run' or 'Search Program and Files' field, type rstrui.
b) Then, press Enter on the keyboard to open System Restore Settings.
Open System Restore on Windows 8
a) Hover your mouse cursor to the lower left corner of the screen and wait for the Start icon to appear.
b) Right-click on the icon and select Run from the list. This will open a Run dialog box.
c) Type rstrui on the 'Open' field and click on OK to initiate the command.
If previous restore point is saved, you may proceed with Windows System Restore. Click here to see the full procedure.
Ways to Prevent Trojan.Crypt.UZD Infection
Take the following steps to protect the computer from threats. Suggested tools and security setup within installed software helps prevent the same attack on your PC.