Email-Worm:​W32/NakedWife

Threat description

Details

Category: Malware
Type: Email-Worm
Platform: W32

Summary

A worm that spreads via e-mail, usually in infected executable e-mail file attachments.



Removal

Automatic action

Depending on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the suspect file, or ask you for a desired action.

More scanning & removal options

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You may also refer to the Knowledge Base on the F-Secure Community site for more information.

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Technical Details

Email-Worm:W32/NakedWife is an e-mail worm that spreads as an attachment called NakedWife.exe. The worm uses MS Outlook Address Book to find e-mail addresses and sends itself to these addresses with the help of MS Outlook application. NakedWife has a destructive payload.

The worm is a PE executable about 74 kb long written in Visual Basic. The most probable origin is Brazil.

Execution

When the worm is run it shows a dialog box that looks like a ShockWave Flash executable animation's dialog. The dialog looks like:

All menus in this dialog box are fake except the 'Help' menu. When a user clicks on it, the worm displays a messagebox:

It should be noted that the worm's file has an icon similar to ShockWave Flash executable animation files and can confuse many users.

Payload

After the worm sends itself it performs a destructive action.

It deletes all *.INI, *.LOG, *.DLL, *.EXE, *.COM and *.BMP files (in that order) in root Windows folder and then deletes all *.INI, *.LOG, *.DLL, *.EXE, *.COM, and *.BMP files in Windows System folder.

A system attacked by this worm becomes unusable shortly after that.

Propagation (E-mail)

After the worm shows its dialog box, it opens MS Outlook Address Book and sends itself to all addresses found there. The infected message has the worm's executable as NakedWife.exe attached. The infected message looks like that:

Subject:Fw: Naked Wife Body:My wife never look like that! ;-) Best Regards,  [Current User]  

where [Current User]is the name of an infected computer's user.





Description Details: Analysis: Alexey Podrezov; F-Secure; March 2001


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