However, we still want to talk about this ransomware, because Apocalypse ransomware can represent a kind of ransomware which uses a custom-designed encryption algorithm, instead of the standard encryption algorithm. Besides, all hash algorithms are ignored, because they will impose an extra burden to catch on that ransomware.Ģ.1 Apocalypse 2.1.1 Introduction of apocalypseĪpocalypse ransomware was found in June 2016, and it has been completely defeated just before it got widely spread. It should be noticed that to help everyone understand the encryption method below we tend to make our discussion in a comprehensible but unscientific way, which means it might be a little different from what happens in the ransomware and what we describe in the paper, but the main idea must be correct. There are 10 kinds of representative ransomware arranged in alphabetical order in this section, and let’s begin to take a look at the encryption method used in that ransomware one by one. Moreover, finally, we conclude our paper with the development trend of ransomware, and some advice to protect ourselves in section 4. However, there is much more ransomware which cannot get cracked. In Section 3, we are going to talk about the vulnerabilities existing in ransomware that cause some ransomware get cracked. The encryption procedure of each ransomware is discussed one by one in Section 2. Anybody who wants to read this paper can decide whether it is helpful from this section. In Section 1, we introduce ransomware and the content of this paper. Moreover, it should be noticed that we only focus our discussion on encryption method and decryption method, something else, such as packing, anti-sandbox, elevation of privilege, DLL injection, are not in consideration.Īt last, due to the limited level of the author, anything inappropriate in the paper, awaits correction by the knowledgeable. Moreover, we sincerely hope that this paper can do some help for the ones who want to have a further analysis on ransomware. We have summarized our work on ransomware and chosen 10 ransomware which we are going to discuss in Section 2.īy this paper, one can understand the basic idea of how ransomware work, and what exact algorithms used to encrypt victim’s personal files. 1.2 Contentīecause ransomware has already disturbed our daily lives, we decide to write something for both non-technicians and technicians. Until now, millions of people have become victims of ransomware, which makes ransomware even more rampant. The first kind of ransomware is found in 1989, and ransomware seems to blowout since 2012.

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