Mystery of Duqu Programming Language Solved

An appeal for help from the programming community has allowed antivirus analysts to classify the unknown language used to develop key components of the Duqu Trojan. The sections responsible for downloading and executing additional modules in the Duqu Trojan, referred to by some as Stuxnet 2.0, were written in standard C++.

Kaspersky Lab experts now say with a high degree of certainty that the Duqu framework was written using a custom object-oriented extension to C, generally called “OO C” and compiled with Microsoft Visual Studio Compiler 2008 (MSVC 2008) with special options for optimizing code size and inline expansion..............

Kaspersky’s analysis now concludes:

• The Duqu Framework consists of “C” code compiled with MSVC 2008 using the special options “/O1″ and “/Ob1″
• The code was most likely written with a custom extension to C, generally called “OO C”
• The event-driven architecture was developed as a part of the Duqu Framework or its OO C extension
• The C&C code could have been reused from an already existing software project and integrated into the Duqu Trojan

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