For all of the concern around Duqu, the most discussed piece of
malicious software since Stuxnet, the latest analysis of its code shows
its writers have a sense of humor.
Wrapped in the code used to infect computers is an "Easter egg," or a
hidden message. Easter eggs have long been inserted in computer code,
often seen only by those who enjoy browsing computer code.
Duqu's exploit, the code used to take advantage of a software
vulnerability, contained the line: "Copyright (c) 2003 Showtime Inc. All
rights reserved. DexterRegularDexter."
The reference to the television show "Dexter" is meant as a joke.
The shellcode of the exploit is contained in an embedded font called
"DexterRegularDexter," which is processed by Windows' Win32k TrueType
font parsing engine, wrote Aleks Gostev, a senior analyst with the Global Research and Analysis Team for Kaspersky Lab.