WorldCup

Summary

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Chick.F is not considered to be a threat as the worm sends itself only once per infected system and only to a single recipient. This variant of Chick worm disguises itself as World Cup 2002 results.

Removal

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Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

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

Technical Details

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The worm spreads in a email messages with the following contents:

Subject:   RE: Korea Japan Results    
Body:       Take a look at these results ... 	    
Regards, 	   
[current user's name]     
Attachment:  koreajapan.chm  

The attachment name vary and could be different.

If the user executes the attached file, the following screen is displayed:

Enable ActiveX To See Korea Japan results  

The script in the compiled HTML help file will be executed when the user answer "Yes" in a dialog box.

After that Chick.F searches on C:, D: and E: drives for "script.ini" file from mIRC installation directory and if find such, the worm sends via mIRC with a filename "koreajapan.chm" previously saved into Windows installation directory.

The worm uses as an infection marker value 1 in the following registry key:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\chm  

and if it is set then it does not spread anymore from infected machine. Therefore Chick.F sends an infected message only to the first recipient found in the first address book.

Detection

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F-Secure Anti Virus detects Chick.F (aka Brit.G) worm with the updates published on June 7th, 2002

Detection Type: PC
Database: 2002-06-07_02

Description Details: Analysis: Katrin Tocheva, F-Secure; June 7th, 2002