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Future Internet 2013, 5(2), 140-167; doi:10.3390/fi5020140

A Methodology for Retrieving Information from Malware Encrypted Output Files: Brazilian Case Studies

GSeg (Information Security Department), CPqD, Rua Dr. Ricardo Benetton Martins, 13086-902 Campinas, Brazil
Received: 18 February 2013 / Revised: 6 April 2013 / Accepted: 15 April 2013 / Published: 25 April 2013
(This article belongs to the Special Issue Security of Systems and Software Resiliency)


This article presents and explains a methodology based on cryptanalytic and reverse engineering techniques that can be employed to quickly recover information from encrypted files generated by malware. The objective of the methodology is to minimize the effort with static and dynamic analysis, by using cryptanalysis and related knowledge as much as possible. In order to illustrate how it works, we present three case studies, taken from a big Brazilian company that was victimized by directed attacks focused on stealing information from a special purpose hardware they use in their environment. View Full-Text
Keywords: malware; cryptanalysis; reverse engineering; stolen information malware; cryptanalysis; reverse engineering; stolen information

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Uto, N. A Methodology for Retrieving Information from Malware Encrypted Output Files: Brazilian Case Studies. Future Internet 2013, 5, 140-167.

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