McAfee > Theat Center > Virus Detail Page

Overview

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• DUNpws.cy

• Trojan.PSW.Barok.c

Characteristics

Update September 6, 2000:
This Trojan was reportedly distributed via spam email to several recipients in the APAC region as the file name "ERAP.EXE".

This Trojan is a password stealer. It is configured via a configuration program to send password information to an email address using TCP/IP connection after installation.

This Trojan is installed if run either intentionally or accidentally on a host system.

This Trojan was written by the same person associated with VBS/Loveletter virus. The original version of that virus downloaded a password stealer similar to this one.

Symptoms

Existence of the file WINCHECK.EXE in the System folder, registry modification in this key:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
WinCheck=[System folder path]\WinCheck.exe

Method of Infection

If the Trojan is run on a system, it will write a file named "WINCHECK.EXE" to the System folder and then modify the registry to load the file at Windows startup.

Removal

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants

N/A

All Information

Overview -

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

Aliases

• DUNpws.cy

• Trojan.PSW.Barok.c

Characteristics

Characteristics -

Update September 6, 2000:
This Trojan was reportedly distributed via spam email to several recipients in the APAC region as the file name "ERAP.EXE".

This Trojan is a password stealer. It is configured via a configuration program to send password information to an email address using TCP/IP connection after installation.

This Trojan is installed if run either intentionally or accidentally on a host system.

This Trojan was written by the same person associated with VBS/Loveletter virus. The original version of that virus downloaded a password stealer similar to this one.

Symptoms

Symptoms -

Existence of the file WINCHECK.EXE in the System folder, registry modification in this key:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
WinCheck=[System folder path]\WinCheck.exe

Method of Infection

Method of Infection -

If the Trojan is run on a system, it will write a file named "WINCHECK.EXE" to the System folder and then modify the registry to load the file at Windows startup.

Removal -

Removal -

All Users :
Script,Batch,Macro and non memory-resident:
Use current engine and DAT files for detection and removal.

PE,Trojan,Internet Worm and memory resident :
Use specified engine and DAT files for detection. To remove, boot to MS-DOS mode or use a boot diskette and use the command line scanner:

Additional Windows ME/XP removal considerations

Users should not trust file icons, particularly when receiving files from others via P2P clients, IRC, email or other mediums where users can share files.

AVERT Recommended Updates :

* Office2000 Updates

* Malformed Word Document Could Enable Macro to Run Automatically (Information/Patch )

* scriptlet.typelib/Eyedog vulnerability patch

* Outlook as an email attachment security update

* Exchange 5.5 post SP3 Information Store Patch 5.5.2652.42 - this patch corrects detection issues with GroupShield

For a list of attachments blocked by the Outlook patch and a general FAQ, visit this link .
Additionally, Network Administrators can configure this update using an available tool - visit this link for more information .

It is very common for macro viruses to disable options within Office applications for example in Word, the macro protection warning commonly is disabled. After cleaning macro viruses, ensure that your previously set options are again enabled.

Variants

Variants -

N/A