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F-Secure Malware Information Pages: Delf.V
[Summary] | [Detailed Description] | [Detection]

Name : Delf.V
Alias:W32/Sixem-A, Email-Worm.Win32.Delf.v, Email-Worm:W32/Delf.v, W32.Sixem.A@mm
Type:Trojan-Downloader, Email-Worm
Category:Malware
Platform:W32
Radar

Summary
Delf.V is a mass-mailing worm that sends out FIFA World Cup (Football/Soccer) related e-mails. It contains subjects such as "Soccer fans killed five teens" and "Crazy soccer fans".
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Detailed Description
Delf.V is a mass-mailing worm that sends out FIFA World Cup (Football/Soccer) related e-mails.


Installation to the System

Delf.V copies itself to the Windows system folder as a file named: msctools.exe.

It Installs the following registry launch points:
  • "nsdevice" = "%SysDir%\msctools.exe"
    [HKLM\Software\Microsoft\Windows\CurrentVersion\Run]
  • "nsdevice" = "%SysDir%\msctools.exe"
    [HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices]
  • "nsdevice" = "%SysDir%\msctools.exe"
    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
%SysDir% represents the Windows System Folder.

The mutex used by Delf.V is named "dezas".


Spreads via E-mail

Delf.V collects e-mail addresses from the following list of file extensions:
  • adb
  • dbx
  • doc
  • eml
  • htm
  • html
  • mbx
  • mdx
  • msg
  • nch
  • not
  • oft
  • rtf
  • sht
  • tbb
  • tbi
  • txt
  • wab
  • xls
  • xml
Addresses are discarded if they contain one of the following keywords:
  • .edu
  • .gov
  • .mil
  • abuse
  • addres
  • admin
  • anonymous
  • anti
  • anyone
  • aol
  • apache
  • avp
  • berkeley
  • borlan
  • bsd
  • bug
  • certific
  • contact
  • cops
  • defend
  • echo
  • example
  • fbi
  • fido
  • foo.
  • google
  • gov.
  • help
  • ibm.com
  • icrosof
  • info
  • inpris
  • kaspersk
  • kernel
  • linux
  • local
  • mcafee
  • microsof
  • mozilla
  • mydomai
  • nobody
  • nodomai
  • norton
  • not
  • nothing
  • page
  • panda
  • pgp
  • policy
  • postmaster
  • privacy
  • random
  • reply
  • report
  • ripe.
  • root
  • samples
  • secur
  • sendmail
  • service
  • spam
  • submit
  • support
  • symantec
  • user
  • virus
  • webmaster
  • webmin
  • webmist
The harvested addresses are saved as two files named cats.jpg and cats2.jpg.
Delf.V tries to post the addresses to [***]traf.com/ms/count.php. It also tries to download and execute a file from http://couple[***].com/tumbs/dianaimg.exe.

Delf.V e-mail contains the following characteristics:

Sender:
  • hotnews@cnn.com
  • kellyjast@hotmail.com
  • lindasal@gmail.com
  • mr.robs@yahoo.com
  • newsreader@hotmail.com
  • todaynews@cnn.com
Subjects:
  • Crazy soccer fans
  • My sister whores, sh[*]t i dont know
  • My tricks for you
  • Naked World Cup game set
  • Please reply me Tomas
  • Soccer fans killed five teens
Body Texts:
  • Crazy soccer fans killed two teens, watch what they make on photos. Please report on this all who know.
  • Emily Carr was an artist known for her prudery, but now the Portrait Gallery of Canada has acquired a nude self-portrait. View photos.
  • Halo Markus, i sent my nude pics. Please reply me with you nude photos ;). Best regard You Sweet Kitty
  • I wait you photos from New York. I sent my pics where i naked for you. Please reply me. Linda Salivan
  • Nudists are organising their own tribute to the world cup, by staging their own nude soccer game, though it is not clear how the teams will tell each other apart. Good photos ;)
  • Soccer fans killed five teens, watch what they make on photos. Please report on this all who know.
Attachement Names:
  • emily_selfphoto.jpg.exe
  • kelly_nude_imgs.jpg.exe
  • linda_bigtit.gif.exe
  • soccer_fans.jpg.exe
  • soccer_nudist.bmp.exe
  • soccer_pics.jpg.exe
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Detection

F-Secure Anti-Virus detects this malware with the following updates:

[FSAV_Database_Version]

Version = 2006-06-20_01.
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F-Secure Corporation

Last Modified: June 20, 2006