Content
WM/CVCK1.B;E
- Type
- Virus
- SubType
- Macro
- Discovery Date
- 05/01/1997
- Length
- Not Applicable
- Minimum DAT
- 4002 (12/02/1998)
- Updated DAT
- 4002 (12/02/1998)
- Minimum Engine
- 5.1.00
- Description Added
- 05/15/1997
- Description Modified
- 05/15/1997 12:00 AM (PT)
Tab Navigation
Characteristics
This virus propagates by infecting Word Documents in Microsoft WORD Versions 6.x / 7.x on Windows and Macintosh platforms. The virus consists of these macros:
ACTION, ACTIONDATE, AUTOEXEC, AUTOOPEN, EDITAUTOTEXT, FILEPRINT, FILEPRINTDEFAULT, FILETEMPLATES, STDCLOSE, TOOLSMACRO
in an infected document. Their names change to:
ACTION, ACTIONDATE, AUTOCLOSE, DEFEATAV, EDITAUTOTEXT, FILEPRINT, FILEPRINTDEFAULT, FILETEMPLATES, STDOPEN, TOOLSMACRO
in Word's Global Template NORMAL.DOT. The virus becomes active by using Auto- and SystemMacros. All macros are encrypted using the standard Word execute-only feature, which means that the user is unable to edit or view the macro code.
Symptoms
On an infected system the virus hides the FILE|TEMPLATES, TOOLS|MACRO, and TOOLS|CUSTOMIZE functionality. Warning: It is important not to use these commands, as you will execute the viral code. If the TOOLS|MACRO command is used a 'Microsoft Word Err=1022' MessageBox will be displayed and Word will quit because of a mistake in coding. If the user opens a file on the 1st or the 13th the same error message is displayed.
On the first infection a mistake in coding causes a 'WordBasic Err=102' MessageBox to be displayed.
Method of Infection
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 :
* 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
- WM/CVCK1.B
- WM/CVCK1.E
All Information
Overview -
This is a virus detection. Viruses are programs that self-replicate recursively, meaning that infected systems spread the virus to other systems, which then propagate the virus further. While many viruses contain a destructive payload, it's quite common for viruses to do nothing more than spread from one system to another.
Characteristics
Characteristics -
This virus propagates by infecting Word Documents in Microsoft WORD Versions 6.x / 7.x on Windows and Macintosh platforms. The virus consists of these macros:
ACTION, ACTIONDATE, AUTOEXEC, AUTOOPEN, EDITAUTOTEXT, FILEPRINT, FILEPRINTDEFAULT, FILETEMPLATES, STDCLOSE, TOOLSMACRO
in an infected document. Their names change to:
ACTION, ACTIONDATE, AUTOCLOSE, DEFEATAV, EDITAUTOTEXT, FILEPRINT, FILEPRINTDEFAULT, FILETEMPLATES, STDOPEN, TOOLSMACRO
in Word's Global Template NORMAL.DOT. The virus becomes active by using Auto- and SystemMacros. All macros are encrypted using the standard Word execute-only feature, which means that the user is unable to edit or view the macro code.
Symptoms
Symptoms -
On an infected system the virus hides the FILE|TEMPLATES, TOOLS|MACRO, and TOOLS|CUSTOMIZE functionality. Warning: It is important not to use these commands, as you will execute the viral code. If the TOOLS|MACRO command is used a 'Microsoft Word Err=1022' MessageBox will be displayed and Word will quit because of a mistake in coding. If the user opens a file on the 1st or the 13th the same error message is displayed.
On the first infection a mistake in coding causes a 'WordBasic Err=102' MessageBox to be displayed.
Method of Infection
Method of Infection -
General Macro Virus Information
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 :
* 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 -
- WM/CVCK1.B
- WM/CVCK1.E
