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Matt,

Thanks so much for your help. For now, this seemed to have solved the problem and found all the infected files. I'll keep you updated, as I know this virus can be very hard to kill.

Thanks a million.

Jason

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Ac3

Aliases of Ac3 (AKA):

[Kaspersky] Trojan-Downloader.Win32.Small.cyh, Trojan-Dropper.Win32.Agent.ata
[Other] Trojan-downloader-ac2, W32/AXF.CYH!tr.dldr, trojan-downloader-ac2

How to Remove Ac3 from Your Computer

To completely purge Ac3 from your computer, you need to delete the files, folders, and Windows registry keys, and registry values associated with Ac3. These files, folders, and registry keys are respectively listed in the Files, Folders, Registry Keys, and Registry Values sections on this page.

For instructions on deleting the Ac3 registry keys and registry values, see How to Remove Ac3 from the Windows Registry.

For instructions on deleting the Ac3 files and folders,
see How to Delete Ac3 Files (.exe, .dll, etc.)

How to Delete Ac3 Files (.exe, .dll, etc.)

The files and folders associated with Ac3 are listed in the Files and Folders sections on this page.

To delete the Ac3 files and folders:

Using your file explorer, browse to each file and folder listed in the Folders and Files sections.
Note: The paths use certain conventions such as [%PROGRAM_FILES%]. These conventions are explained here.
Select the file or folder and press SHIFT+Delete on the keyboard.
Click Yes in the confirm deletion dialog box.

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.

Files:

[%SYSTEM%]\xfz42d7a.dll
[%WINDOWS%]\ac3_0002.exe
[%SYSTEM%]\set39699.dll
[%SYSTEM%]\set39699.sys
[%WINDOWS%]\ac3_0008.exe

view mapping details

Scan your File System for Ac3

How to Remove Ac3 from the Windows Registry

The Windows registry stores important system information such as system preferences, user settings, and installed programs details as well as the information about the applications that are automatically run at start-up. Because of this, spyware, malware, and adware often store references to their own files in your Windows registry so that they can automatically launch every time you start up your computer.

To effectively remove Ac3 from your Windows registry, you must delete all the registry keys and values associated with Ac3, which are listed in the Registry Keys and Registry Values sections on this page.

IMPORTANT: Because the registry is a core component of your Windows system, it is strongly recommended that you back up the registry before you begin deleting keys and values. For information about backing up the Windows registry, refer to the Registry Editor online help.

To remove the Ac3 registry keys and values:

On the Windows Start menu, click Run.
In the Open box, type regedit and click OK.
The Registry Editor window opens. This window consists of two panes. The left pane displays folders that represent the registry keys arranged in hierarchical order. The right one lists the registry values of the currently selected registry key.
To delete each registry key listed in the Registry Keys section, do the following:
- Locate the key in the left pane of the Registry Editor window by sequentially expanding the folders according to the path indicated in the Registry Keys section. For example, if the path of a registry key is HKEY_LOCAL_MACHINE\software\FolderA\FolderB\KeyName1, sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA, and FolderB folders.
- Select the key name indicated at the end of the path (KeyName1 in the example above).
- Right-click the key name and select Delete on the menu.
- Click Yes in the Confirm Key Delete dialog box.
To delete each registry value listed in the Registry Values section, do the following:
- Display the value in the right pane of the Registry Editor window by sequentially expanding the folders in the left pane according to the path indicated in the Registry Values section and selecting the specified key name. For example, if the path of a registry value is HKEY_LOCAL_MACHINE\software\FolderA\FolderB\KeyName2\,valueC=, sequentially expand the HKEY_LOCAL_MACHINE, software, FolderA, and FolderB folders and select the KeyName2 key to display the valueC value in the right pane.
- In the right pane, select the value name indicated after a comma at the end of the path (valueC in the example above).
- Right-click the value name and select Delete on the menu.
- Click Yes in the Confirm Value Delete dialog box.

Registry Values:

HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1503909
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1524246
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1628967
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1702774
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1935170
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=1985786
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=209143
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=2606793
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=2853243
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=3723585
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=3822734
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=4083470
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=4191254
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=423846
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=4339006
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=4404892
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=4608422
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=497271
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=5104235
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=5199362
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=5327487
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=573896
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=5896831
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=6324932
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=6399019
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=6523567
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=6572090
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=6694938
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=717568
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=7266619
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=7613811
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=848408
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion, client=
HKEY_LOCAL_MACHINE\software\microsoft\windows\currentversion\run, vsm62b17=rundll32.exe w3a0cd8f.dll, n 00662b11000000123a0cd8f=

Scan your Windows Registry for Ac3

Ac3 Categorized as:

Downloader

A type of trojan. The primary purpose of downloaders is to install malicious code on a user’s computer. However, they can enable other malicious uses. For example, they can be used to continually download new versions of malicious code, adware, or “pornware.” They are also used frequently used to exploit the vulnerabilities of Internet Explorer.

Downloaders are typically written in script languages such as VBS or JavaScript.

How Did My PC Get Infected with Ac3?

The following are the most likely reasons why your computer got infected with Ac3:

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 Ac3. 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 Ac3.

Visiting Questionable Web Sites

When you visit sites with dubious or objectionable content, trojans-including Ac3-, spyware, and adware, may well be automatically downloaded and installed onto your computer.

Detecting Ac3

The following symptoms signal that your computer is very likely to be infected with Ac3.

PC is working very slowly
Ac3 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 Ac3.

New desktop shortcuts have appeared or the home page has changed
Ac3 can tamper with your Internet settings or redirect your default home page to unwanted web sites. Ac3 may even add new shortcuts to your PC desktop.

Annoying popups keep appearing on your PC
Ac3 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
Ac3 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.

Check now if your PC is infected with Ac3

Also Be Aware of the Following Threats:

Downloader

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