Content
W97M/Change.A
- Type
- Virus
- SubType
- Macro
- Discovery Date
- 01/01/1997
- Length
- Minimum DAT
- 4001 (11/25/1998)
- Updated DAT
- 4001 (11/25/1998)
- Minimum Engine
- 5.1.00
- Description Added
- 10/01/1999
- Description Modified
- 09/18/2002 1:16 PM (PT)
Tab Navigation
Characteristics
This virus propagates by infecting Word documents in Microsoft Word 97 and 2000. It is not able to replicate under the SR-1 release of Word 97. Upgrading to the SR-1 release of Word 97 or later will stop it from spreading. This virus contains the text
'WordBasic.ToolsMacro Name:="¥"°1", Show:=0, Run:=1
which is never displayed.
Symptoms
On the 1st of any month this virus' payload will activate. This virus will try to delete the files c:\AUTOEXEC.BAT from your computer.
Macro warning if opening infected document, increase in size to global template.
Method of Infection
Opening infected documents will infect global template normal.dot and infect documents upon closing them or closing Word97.
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
N/A
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 97 and 2000. It is not able to replicate under the SR-1 release of Word 97. Upgrading to the SR-1 release of Word 97 or later will stop it from spreading. This virus contains the text
'WordBasic.ToolsMacro Name:="¥"°1", Show:=0, Run:=1
which is never displayed.
Symptoms
Symptoms -
On the 1st of any month this virus' payload will activate. This virus will try to delete the files c:\AUTOEXEC.BAT from your computer.
Macro warning if opening infected document, increase in size to global template.
Method of Infection
Method of Infection -
Opening infected documents will infect global template normal.dot and infect documents upon closing them or closing Word97.
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 -
N/A