The Zhelatin.CT worm started to spread on April 13th, 2007. The worm spreads in emails 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.
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The functionality of the Zhelatin.CT worm variant is similar to Zhelatin.CQ , however the subjects and attachment names it uses are different.
On April 13th several emails 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:
The email messages themselves have no text, instead, they have attached executables with romantic sounding filenames. These include:
Here is an example of the worm's email:
A second run occurred after a few hours. This time, the subjects were security related:
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:
The executable contained within the Zip archive has the same name as that of the archive but with an EXE extension.