Ryuk

Malware
23 incidents First seen 2026-01-29 Last seen 2026-09-25
Overview

Ryuk is a ransomware designed to target enterprise environments that has been used in attacks since at least 2018. Ryuk shares code similarities with Hermes ransomware.

Threat ecosystem
Actors Malware Campaigns CVEs
Tap a node for a quick look · double-tap to open its profile
At a glance
peak priority 145 32 techniques 2 groups use it Windows in ATT&CK since 2020-05-13 updated 2025-04-22 · v1.4
Activity by month (incidents)
2026-012026-09
Sectors targeted
health · 6technology · 5finance · 3government · 2legal · 2education · 1energy · 1manufacturing · 1
Countries targeted
UA · 13AM · 12US · 12CA · 10IE · 4RU · 4AZ · 3BY · 3CH · 3DE · 3FR · 3GB · 3
Origin
UA · 6US · 6CA · 4RU · 4GB · 3IE · 3
Kinds of incident
Ransomware & Extortion · 18Law Enforcement · 15Malware & Botnets · 2Phishing & Social Engineering · 2Data Breach · 1Industry & Policy · 1
Techniques seen in incidents
Ransomware · 23Extortion · 12Phishing · 6Social Engineering · 3T1059.001 - PowerShell · 3Ddos · 2Exfiltration · 2Impersonate · 2T1566 - Phishing · 2T1584.006 - Web Services · 2Botnet · 1Credential Stuffing · 1Data Breach · 1Data Leak · 1
Related actors
BlackByte · 2Wizard Spider · 2Contagious Interview · 1NoName057(16) · 1Transparent Tribe · 1
Related CVEs
CVE-2025-61155 · 1CVE-2025-64721 · 1CVE-2025-68947 · 1
ATT&CK techniques by tactic (32)
initial access T1078.002 Domain Accounts
execution T1053.005 Scheduled Task T1059.003 Windows Command Shell T1106 Native API
persistence T1053.005 Scheduled Task T1078.002 Domain Accounts T1205 Traffic Signaling T1547.001 Registry Run Keys / Startup Folder
privilege escalation T1053.005 Scheduled Task T1055 Process Injection T1078.002 Domain Accounts T1134 Access Token Manipulation T1547.001 Registry Run Keys / Startup Folder
discovery T1016 System Network Configuration Discovery T1057 Process Discovery T1083 File and Directory Discovery T1614.001 System Language Discovery T1680 Local Storage Discovery
lateral movement T1021.002 SMB/Windows Admin Shares
command and control T1205 Traffic Signaling
impact T1486 Data Encrypted for Impact T1489 Service Stop T1490 Inhibit System Recovery
stealth T1027 Obfuscated Files or Information T1036 Masquerading T1036.005 Match Legitimate Resource Name or Location T1055 Process Injection T1078.002 Domain Accounts T1134 Access Token Manipulation T1205 Traffic Signaling
defense impairment T1222.001 Windows Permissions T1685 Disable or Modify Tools
Groups that use it
FIN6Wizard Spider
Incident timeline
2026-09-24
Ryuk Member Karen Vardanyan Sentenced to Two Years in U.S. Prison
2026-09-23
Ryuk Ransomware Operator Sentenced to 24 Months in Prison
2026-09-23
Ryuk ransomware operator gets 2-year sentence after extorting victims for $1.2 million
2026-09-23
Ryuk ransomware member sentenced to 24 months in prison
2026-09-11
Conti ransomware gang member sentenced to 4 years in prison
2026-07-13
Hacker Extradited from Ukraine Pleads Guilty to Ryuk Ransomware Charges
2026-07-12
Ryuk Ransomware Member Pleads Guilty Over Attacks on U.S. Organizations
2026-07-10
Armenian national pleads guilty to Ryuk ransomware attacks
2026-07-10
Ryuk ransomware member pleads guilty in the US, faces 15 years in prison
2026-07-10
Ryuk operator pleads guilty; Blackcat/AlphV conspirator gets nearly 6-year sentence
2026-06-14
Ukrainian Extradited from Ireland Pleads Guilty Over Role in Conti Ransomware Scheme
2026-06-14
Ukrainian Extradited from Ireland Pleads Guilty Over Role in Conti Ransomware Scheme
2026-06-12
Ukrainian national pleads guilty to role in Conti ransomware operation
2026-06-07
Silent Ransom Group targets law firms with fake IT support calls
2026-05-27
FBI warns of in-person data theft attacks from extortion gang
2026-03-07
Termite ransomware breaches linked to ClickFix CastleRAT attacks
2026-02-10
Reynolds Ransomware Embeds BYOVD Driver to Disable EDR Security Tools
2026-02-05
ThreatsDay Bulletin: Codespaces RCE, AsyncRAT C2, BYOVD Abuse, AI Cloud Intrusions & 15+ Stories
2026-02-04
New Technical Markers Reveal Expanding ShadowSyndicate Cybercriminal Infrastructure
2026-01-29
FBI Takes Down RAMP Ransomware Forum