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Storm worm
Mass e-mailed worm is detected and removed by most antivirus products
By Robert Vamosi (January 19, 2007)

QUICK FACTS
Name: Storm worm, alias Download.bai (McAfee), Dorf (Sophos), Peacomm (Symantec), SMALL(Trend Micro), CME-711, Nuwar (Windows Live OneCare)

Date first reported: 1/19/07

Vulnerable software: NA

What it does: This e-mail worm sends copies of itself to addresses harvested from an infected computer.

Recommendations: Do not open attached files within unsolicited e-mails.

Exploit code available: NA

Vendor patch available: NA
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4
out of 10
INTERNET THREAT RATING
How we rate
A new computer worm known as storm worm--Download.bai (McAfee) and Peacomm (Symantec)--is taking advantage of a winter storm in Europe and using its downloaded backdoor Trojan to change its message to the rest of the world. The spammed e-mail arrives either with a blank subject line or with one of the following:

U.S. Secretary of State Condoleezza Rice has kicked German Chancellor Angela Merkel
Naked teens attack home director
A killer at 11, he''s free at 21 and kill again!
British Muslims Genocide
230 dead as storm batters Europe.

E-mail contains one of the following attachments:

Read More.exe
Full Clip.exe
Full Story.exe
Video.exe

If the attached file is opened, according to security vendor McAfee, the following occurs:

Two files are added to the system directory:

  • %SystemDir%\peers.ini (5,483 bytes)
  • %SystemDir%\wincom32.sys (41,728 bytes)

The virus then creates the following within the system registry :

  • Hkey_Local_Machine\System\CurrentControlSet\Services\Wincom32\ Imagepath="\??\%SYSTEMDIR%\wincom32.sys"
  • Hkey_Local_Machine\System\CurrentControlSet\Services\Wincom32\ displayname="wincom32"
  • Hkey_Local_Machine\System\CurrentControlSet\Services\Wincom32\ start="2"
Finally, the Snow worm downloads a program called Game0.exe to the system directory. This application is designed to be controlled remotely and can direct a compromised machine to send out spam carrying additional copies of the virus.

Additional resources
News.com: Snow worm rages across the globe
McAfee: Downloader-BAI
Symantec: Peacomm