Packed.Win32.Tdss.f is a Trojan that can hide its presence when infecting system files by injecting a code on legitimate Windows processes. This highly advanced method of infection is called rootkit technique. Packed.Win32.Tdss.f is also capable of creating a backdoor port to allow a remote attacker to gain full access on the compromised computer without user’s consent. This approach may give an attacker access to sensitive data that are stored on the system.
Alias: Packed.Generic.200, Virus.Win32.Fasec, Rootkit.Win32.TDSS, DNSChanger.r, Trojan:Win32/Alureon.gen!J, Generic FakeAlert.k, Trojan:Win32/FakeSpyguard, Mal/Alureon-C, Mal/TDSSPack-E, Packed.Win32.Tdss
Damage Level: Medium
Systems Affected: Windows 9x, 2000, XP, Windows Vista
Once it executes on the computer, the Trojan will inject a harmful code on legitimate system processes. Although it will not corrupt the file, its effect can ruin the operation of antivirus software. It can actually make security program useless.
In order to conceal its presence, Packed.Win32.Tdss.f embeds its executable process on system files. Only noticeable change is sudden reduction on the performance of the PC. Due to high memory usage, affected computer may also crash from time to time.
Packed.Win32.Tdss.f may arrive on target computer is several ways. The most common avenue for propagation is through spamming. A link presented on instant messaging application may lead user to a malicious web site hosting a copy of Packed.Win32.Tdss.f. Fake software update also leads unsuspecting user to install the Trojan without full knowledge that this simple mistake may cause severe damages.
Another means to spread this threat is through drive-by-download. Packed.Win32.Tdss.f can penetrate the computer if user pays a visit to a web site that is either legitimate but compromised or web pages that are harmful in nature. The infection process is so covert that visitor’s may not realized that the Trojan is automatically loaded into their PC.
How to Remove Packed.Win32.Tdss.f
1. Temporarily Disable System Restore if you are using Windows XP. For Windows Vista/7 users, you may use System Restore to return Windows to a previous clean state. However, you must have a saved restore points to accomplish this. Otherwise, proceed with the removal process.
2. To be able to identify even the most recent variant of Packed.Win32.Tdss.f, open your antivirus application and update the virus definition file.
3. Start Windows in Safe Mode with Networking.
- From a power-off state, turn on the computer and press F8 on your keyboard repeatedly.
- Your computer will display Windows Advanced Boot Options menu. Please select Safe Mode with Networking.
- The system will now boot Windows and loads only necessary drivers and files.
4. Open your antivirus program and run a full system scan. After the scan, delete all infected items. If unable to delete, better place them in quarantine. Once the scan is complete, please proceed with the next step.
Scan with Norton Power Eraser:
Additional virus removal tool like Norton Power Eraser provides deep scanning technology to eliminate other threats not detected by a normal virus scan. Use this tool with extra caution.
5. Go to this link and download Norton Power Eraser.
6. Once the download completes, double click on the file NPE.exe to run the program.
7. It will prompt for End User License Agreement, click on Accept to continue.
8. On NPE main window, click on Scan. Then select Include Rootkit Scan. Click on Continue to proceed.
9. Virus scanning may take some time. After running the scan, NPE will display the scan result.
Important! If there are any detected threats under Suspicious, remove the check mark. Only threats in Detected category are necessary to remove at this point. Make sure that you mark the Create System Restore Point before proceeding with the fix.
10. Now click on Fix to start removing the threats including Packed.Win32.Tdss.f remnants if there are any.
11. When done, Norton Power Eraser will restart the computer. Then after a reboot, it will initialize and display the eliminated threats.
12. You may now close Norton Power Eraser.
Alternative Removal Method for Packed.Win32.Tdss.f
Option 1 : Use Windows System Restore to return Windows to previous state
If Packed.Win32.Tdss.f enters the computer, there is a big chance that Windows files, registry entries and other essential components are also infected. System Restore can reinstate clean system files by restoring the configuration to an earlier date. The method also replaces compromised files with a clean version. If you have a saved restore point before Packed.Win32.Tdss.f infiltrates the PC, we highly encourage you to execute this procedure if none of the above works. You may proceed with Windows System Restore, click here to see the full procedure.
Option 2 : Packed.Win32.Tdss.f manual uninstall guide
IMPORTANT! Manual removal of Packed.Win32.Tdss.f requires technical skills. Deleting system files and registry entries by mistake may result to total disability of Windows system. We advise you to perform a backup of registry before proceeding with this guide.
1. Kill any running process that belongs to Packed.Win32.Tdss.f.
- Press Ctrl+Alt+Del on your keyboard.
- When Windows Task Manager appears, look for Packed.Win32.Tdss.f files (refer to Technical Reference) and click End Process.
2. Delete all registry entries that belong to this malware.
- Press [Windows Key]+R on your keyboard.
- In the 'Open' dialog box, type regedit and press Enter. This will open registry editor.
- Find and delete registry entries as mentioned in Technical Reference section below.
- Close registry editor. Changes made will be save automatically.
3. Scan the computer with antivirus program.
- Connect to Internet and open your antivirus software. Please update to obtain the latest database and necessary files.
- Restart the computer in Safe Mode.
- Just before Windows logo begins to load press F8 on your keyboard.
- On Windows Advanced Boot Options, select Safe Mode and press Enter.
4. Delete all files dropped by Packed.Win32.Tdss.f.
- While still in Safe Mode, search and delete malicious files. Please refer to 'Technical Reference'. Make sure that you execute 'End Task' first before deleting the file. Otherwise, the system will not let you perform this action.