A Trojan horse program is a malware that is not capable of automatically spreading to other systems. Trojans are usually downloaded from the Internet and installed by unsuspecting users.
Trojans typically carry payloads or other malicious actions that can range from the mildly annoying to the irreparably destructive. They may also modify system settings to automatically start. Restoring affected systems may require procedures other than scanning with an antivirus program.
For additional information about this threat, see:
Description created:Aug. 18, 2009 7:42:20 AM GMT -0800
Important note: The "Minimum scan engine" refers to the earliest Trend Micro scan engine version guaranteed to detect this threat. However, Trend Micro strongly recommends that you update to the latest version in order to get comprehensive protection. Download the latest scan engine here.
For Windows ME and XP users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 1: Identify and terminate files detected as TROJ_BUZUS.AYX [learn how]
For Windows 98 and ME users, Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 1: Identify and terminate files detected as TROJ_BUZUS.AYX [back]
To terminate the malware/grayware/spyware process:
Scan your computer with your Trend Micro product and take note of the name of the malware/grayware/spyware detected.
Open Windows Task Manager. • For Windows 98 and ME users, press
CTRL+ALT+DELETE • For Windows NT, 2000, XP, and Server 2003 users, press
CTRL+SHIFT+ESC, then click the Processes tab.
In the list of running programs, locate a malware/grayware/spyware file detected earlier.
Select the detected files, then press either the End Task or the End Process button, depending on the version of Windows you are using.
Do the same for the remaining detected malware/grayware/spyware files in the list of running programs.
To check if the malware/grayware/spyware process has been terminated, close Task Manager, and then open it again.
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
Restore these modified registry values [learn how]
From: EnableDCOM = "N"
To: EnableDCOM = "Y"
From: restrictanonymous = "1"
To: restrictanonymous = "0"
Restore these modified registry values [back]
To restore the registry value this malware/grayware/spyware modified:
Still in the left panel of the Registry Editor, double-click the following:
In the right panel, locate the registry value: EnableDCOM = "N"
Right-click on the value name and choose Modify. Change the value data of this entry to: Y
In the left panel, double-click the following:
In the right panel, locate the registry value: restrictanonymous = "1"
Right-click on the value name and choose Modify. Change the value data of this entry to: 0
Close Registry Editor.
Step 4: Reset the Internet Explorer Home and Search pages [learn how]
Step 4: Reset the Internet Explorer Home and Search pages [back]
To reset your Internet Explorer Home and Search Pages:
Close all Internet Explorer windows.
Open Control Panel. To do this, click Start>Settings>Control Panel.
Double-click the Internet Options icon.
In the Internet Properties window, click the Programs tab.
(Note: If you are running Internet Explorer 7 (IE7), click the Advanced tab.)
Click the Reset Web Settings... button.
(Note: On IE7, click the Reset button. Note that by doing this, you are resetting IE back to its default settings.)
Select Also reset my home page. Click Yes.
Step 5: Scan your computer with your Trend Micro product to delete files detected as TROJ_BUZUS.AYX
*Note: If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.