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Virus Profile: W97M/Smac.d

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Virus Profile information details
Risk Assessment: Home Low | Corporate Low
Date Discovered: 1/14/2000
Date Added: 1/26/2000
Origin: N/A
Length: N/A
Type: Virus
Subtype: Macro
DAT Required: 4062
Removal Instructions
   
 
 
   

Description

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.

Indication of Infection

Existence of the export file mentioned in the characteristics (c:\bdoc2.txt or c:\dboc2.sys in .e variant) during Word97 session, message boxes as mentioned above, macro warning when opening infected documents on non-infected system.

Methods of Infection

Opening infected documents will directly infect the local Word environment and any document used thereafter.

Aliases

W97M/Smac.gen, W97M_BDOC2X, WM97/Smac-D
   

Virus Characteristics

This is a macro virus which infects Word 97 documents and templates. This virus can infect Word 97 environments which have been updated to SR-1 or higher. This virus writes its code to a temporary file on the local system as "c:\bdoc2.txt" in order to transfer to host documents and templates.

When closing infected documents on September 2 of any year, a message box is displayed with this info:

"OAO¶µÄx£,£ , ÉúEO¿ìAÖ!!!"
[OK]

When closing Word97, the file c:\bdoc2.txt is deleted. Also if it is the 13th day of the month, a message box is displayed with this info:

"ÇëE1OAµA°æEí¼_,Press OK!!"
[OK]

Variants

Variants information
Virus Name Type Subtype Differences
W97M/Smac.a Virus Macro Polymorphic code.
W97M/Smac.e Virus Macro Minor differences - exports code to "c:\dboc2.sys".
   
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:

SCANPM /ADL /CLEAN /ALL

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.

   

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