First posted on 25 May 2007.
Source: SecurityHome
Email-Worm:W32/Zhelatin.CT is also known as  Email-Worm.Win32.Zhelatin.ct, Zhelatin.ct.
The Zhelatin.CT worm started to spread on April 13th, 2007. The worm spreads in e-mails with love-related subjects and with attachments named "Love Card.exe", "Greeting Card.exe" and so on. A bit later the same variant spread using security-related subjects.
 On April 13th several e-mails with love themed subjects were seen in the wild. While some of the subjects are a rehash of previously used subjects such as Sending You My Love, The Dance of Love, and When I'm With You, others are new:
 
 - A Dream is a Wish
  - A Is For Attitude
  - Eternal Love
  - Eternity of Your Love
  - Falling In Love with You
  - Hugging My Pillow
  - Inside My Heart
  - Kisses Through E-mail
  - Our Journey
  - Sent with Love
  - When Love Comes Knocking
  - You're In My Thoughts
  - You're the One
  
 
The e-mail messages themselves have no text, instead, they have attached executables with romantic sounding filenames. These include:
 
 - Love Card.exe
  - Love Postcard.exe
  - Greeting Card.exe
  - Postcard.exe
  
 
Here is an example of the worm's e-mail:
A second run occurred after a few hours. This time, the subjects were security related:
 
 - ATTN!
  - Spyware Alert!
  - Virus Alert!
  - Worm Alert!
  - Worm Detected!
  
 
Furthermore, the message body is an image file which advises the receiver to patch their systems. Also included within the image is a password in order to extract the attachment. Here is an example:
Something new to the Zhelatin family is the use of a password protected Zip archive as an attachment. The filenames vary but they have the following format:
 
 - patch-[4 to 5 random numerical characters].zip
  - hotfix-[4 to 5 random numerical characters].zip
  
 
The executable contained within the Zip archive has the same name as that of the archive but with an EXE extension.
Last update 25 May 2007
 
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