Ryuk is fond of video games, first shown in the omake eight-panel comic series, where he asks Light for a Silver Game Boy Advance SP for Christmas. [3] On another occasion, Ryuk asks Light if he wants to play Mario Golf (changed to "video games" in the anime), but receives no answer, since Light's bedroom is bugged with microphones and rigged with cameras. https://medium.com/s2wblog/anatomy-of-chaos-ransomware-builder-and-its-origin-feat-open-source-hidden-tear-ransomware-ffd5937d005f The Onyx group simply customized their ransom note and created a refined list of file extensions they wished to target. There is little other modification to differentiate it from any other samples built with Chaos v4.0.

The malware can now also stop various services on the victim device. Based on our analysis of Yashma samples taken from the wild, these are the services we’ve seen the updated malware target: The Relight films are a condensed version of the anime series. The premise of the films is that Ryuk tells the story to a fellow Shinigami. It’s not often that we get to observe the behind-the-scenes drama that can accompany the creation of new malware, but when we do, it gives us a fascinating glimpse into how threat actors operate. One such glimpse, stemming from an online exchange between a ransomware perpetrator and a victim, gave us new insights into the origins of Chaos malware, revealing a twisted family tree that links it to both Onyx and Yashma ransomware variants. Ryuk regards Light as "interesting," specifically due to his experiments and the loopholes he discovers regarding the Death Note's rules and instructions, occasionally discovering abilities of the notebook even Ryuk did not know existed. Though he finds Light interesting, he does not care whether Light lives or dies and does not actively assist him. At times, he withholds important information from Light and only assists him when he has something to gain from it. As his only purpose in dropping the notebook was because he was bored, most of his actions are primarily motivated by wanting to see something interesting, as he sees Light's use of the Death Note and the way humans react to it as truly entertaining. Ryuk is intelligent, but Light's ability to understand his desires easily makes him able to be manipulated.

1. Ryuk Ransom Notes

Lateral movement is continued until privileges are recovered to obtain access to a domain controller. The host discovery algorithm works in two stages. First, the sample attempts to discover which subnets the machine is connected to, and during the second stage it scans the subnet. In addition, as part of our membership in the Cyber Threat Alliance, details of this threat were shared in real time with other Alliance members to help create better protections for customers. IOCs Hermes ransomware, the predecessor to Ryuk, was first distributed in February 2017. Only one month after its release, a decryptor was written for Hermes, followed by the release of version 2.0 in April 2017, which fixed vulnerabilities in its cryptographic implementation. Since this release, the only way for a victim to recover files is with the private encryption key, which is obtained by paying the ransom. In late August 2017, Hermes version 2.1 was released.

Despite not being the most cutting-edge, Ryuk is not be toyed with. General description of Ryuk Ransomware As mentioned in the Hermes to Ryuk section, Ryuk uses a combination of symmetric (AES) and asymmetric (RSA) encryption to encrypt files. Without the private key provided by WIZARD SPIDER, the files cannot be decrypted and are unrecoverable. A thread is created for the encryption of each file and each file is encrypted with its own AES key. After the file has been encrypted, a file extension of .RYK is appended to the file. All directories will have a ransom note of ( RyukReadMe.txt ) written to the directory.This version of Chaos encrypts victim files with AES-256, and then appends a key to the end of each file to signify they’ve been encrypted. This key is then used by the newly designed decryptor to decode the files, returning them to their original, unencrypted state.

It is a known fact that the organization associated with Emotet is MUMMY SPIDER, which has been connected with the WIZARD gang in the past. Conclusion A video recorded in the ANY.RUN malware hunting service allows us to watch the execution process of Ryuk malware in action. I was the whole thing, Taro. That was some pretty smart thinking. Hyuk hyuk hyuk. So how was it… the Land of the Dead?” ( Pilot chapter) Chaos (and subsequently Yashma) have seen rapid development and advances throughout the last year, with its most recent iteration, “Yashma” (Chaos v6.0), found in-the-wild in mid-2022. Shinigami's Eyes: Ryuk can see the real name and the remaining lifespan of a human simply by looking at them. He can also make a deal with a human being possessing a Death Note by giving him the same ability in exchange of half of the remaining lifespan of the human.In Death Note: The Musical, Ryuk's role is very similar to canon, although he notably interacts more with Rem. Ryuk deliberately writes the instructions inside the front cover of the Death Note (in English, which he assumed to be the most popular language in the Human World) so people would understand its purpose. The Death Note is discovered by Light, and Ryuk follows him around for much of the series to see how Light uses it.

Ryuk visits Light after he has begun using the Death Note, celebrating the creation of Kira, which he finds interesting. Ryuk stays by Light's side, such as attending Misa's live performance and seeing Rem again when Misa and Light meet up. When it seems that Rem is getting attached to Misa, Ryuk reminds her not to break the Shinigami rule about helping humans. When Misa first meets L and realizes the name she sees doesn't match what he gave her, Ryuk tells her that she isn't supposed to know that so she doesn't make it obvious.Note that all executions, including injected payloads, attempt to encrypt network drives. More on this later. The sfist describes Ryuk as the sole "(potential) cheeseball factor" of the first film and that he may be "difficult to get used to." The article stated that Ryuk "adds" to the film if the viewers "let go enough to accept Ryuk's presence." The first executable, bitsran.exe , is a dropper, and RSW7B37.tmp is the Hermes ransomware executable. The dropper’s goal is to propagate the Hermes executable within a network by creating scheduled tasks over SMB sessions using hard-coded credentials. The Hermes executable then encrypts files on the host. It is interesting to note that the compiler and linker for Hermes is different from the other executables. All of the executables except for Hermes were compiled with Visual Studio 10, with a linker of Visual Studio 10. Hermes, in contrast, was compiled with Visual Studio 9, with an unknown linker.