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Threat Group Cards: A Threat Actor Encyclopedia

Permanent link Tool: Ryuk

NamesRyuk
CategoryMalware
TypeRansomware, Big Game Hunting
DescriptionRyuk is a ransomware which encrypts its victim's files and asks for a ransom via bitcoin to release the original files. It is has been observed being used to attack companies or professional environments. Cybersecurity experts figured out that Ryuk and Hermes ransomware shares pieces of codes. Hermes is commodity ransomware that has been observed for sale on dark-net forums and used by multiple threat actors.
Information<https://www.crowdstrike.com/blog/big-game-hunting-with-ryuk-another-lucrative-targeted-ransomware/>
<https://www.csoonline.com/article/3541810/ryuk-ransomware-explained-a-targeted-devastatingly-effective-attack.html>
<https://www.cybereason.com/blog/triple-threat-emotet-deploys-trickbot-to-steal-data-spread-ryuk-ransomware>
<https://research.checkpoint.com/ryuk-ransomware-targeted-campaign-break/>
<https://www.fireeye.com/blog/threat-research/2019/01/a-nasty-trick-from-credential-theft-malware-to-business-disruption.html>
<https://www.fireeye.com/blog/threat-research/2019/04/pick-six-intercepting-a-fin6-intrusion.html>
<https://securingtomorrow.mcafee.com/other-blogs/mcafee-labs/ryuk-ransomware-attack-rush-to-attribution-misses-the-point/>
<https://thedfirreport.com/2020/10/08/ryuks-return/>
<https://cofense.com/the-ryuk-threat-why-bazarbackdoor-matters-most/>
<https://www.deepinstinct.com/2020/11/24/ryuk-ransomware-the-deviance-is-in-the-variance/>
<https://www.cybereason.com/blog/cybereason-vs.-ryuk-ransomware>
<https://www.advanced-intel.com/post/crime-laundering-primer-inside-ryuk-crime-crypto-ledger-risky-asian-crypto-traders>
<https://www.cert.ssi.gouv.fr/uploads/CERTFR-2021-CTI-006.pdf>
<https://www.darkreading.com/vulnerabilities---threats/ryuks-rampage-has-lessons-for-the-enterprise/a/d-id/1340533>
<https://www.advanced-intel.com/post/adversary-dossier-ryuk-ransomware-anatomy-of-an-attack-in-2021>
<https://news.sophos.com/en-us/2021/05/06/mtr-in-real-time-pirates-pave-way-for-ryuk-ransomware/>
<https://securityintelligence.com/articles/ryuk-ransomware-operators-shift-tactics/>
<https://www.mcafee.com/blogs/other-blogs/mcafee-labs/new-ryuk-ransomware-sample%e2%80%aftargets-webservers/>
Malpedia<https://malpedia.caad.fkie.fraunhofer.de/details/win.ryuk>
AlienVault OTX<https://otx.alienvault.com/browse/pulses?q=tag:Ryuk>
Playbook<https://pan-unit42.github.io/playbook_viewer/?pb=ryuk-ransomware>

Last change to this tool card: 10 February 2022

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All groups using tool Ryuk

ChangedNameCountryObserved

APT groups

 FIN6, Skeleton Spider[Unknown]2015-Oct 2021X
 Wizard Spider, Gold BlackburnRussia2014-Jun 2022X

Other groups

 UNC1878[Unknown]2020 

3 groups listed (2 APT, 1 other, 0 unknown)

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Electronic Transactions Development Agency

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