Ransomware Intelligence / Groups / beast
Ransomware group
beast
Beast ransomware emerged in 2022 as an enhanced iteration of the earlier “Monster” ransomware. It operates under a Ransomware-as-a-Service (RaaS) model, offering affiliates rich customization options to create tailored binaries targeting Windows, Linux, and VMware ESXi systems. Key technical capabilities include hybrid Elliptic-Curve + ChaCha20 encryption, segmented file encryption, ZIP wrapper mode (encrypting files into zip archives with embedded ransom notes), multithreaded processing, termination of services, shadow copy deletion, hidden partition usage, and subnet scanning. Affiliates are provided configurable offline builders, enabling streamlined deployment across multiple platforms. While Beast's functional power is well-documented, details on its specific victims, sectors targeted, and leak site activity remain limited in public sources.
- 0claims, 7 days
- 0claims, 30 days
- 3claims, 90 days
- 2026-08-24first seen
- 2026-09-10last seen
These are claims posted by the group on its leak site, counted when we first see them. They are not confirmed incidents, and we never name a victim.
Activity, last 26 weeks
New leak-site claims per week.
Sectors claimed, last 90 days
- Unclassified 3
Countries claimed, last 90 days
- Unknown 3
Vulnerabilities with known ransomware use
From CISA's Known Exploited Vulnerabilities catalog, newest first. The catalog does not attribute entries to a specific group; this is the current patch list for any ransomware operator.
| Added | CVE | Vendor / product | Vulnerability |
|---|---|---|---|
| 2026-08-18 | CVE-2026-59310 | Broadcom VMware vCenter | Broadcom VMware vCenter Path Traversal Vulnerability |
| 2026-08-05 | CVE-2026-63077 | JetBrains TeamCity | JetBrains TeamCity Deserialization of Untrusted Data Vulnerability |
| 2026-07-29 | CVE-2026-20316 | Cisco Secure Firewall Management Center (FMC) | Cisco Secure Firewall Management Center Use of Hard-coded Password Vulnerability |
| 2026-07-14 | CVE-2026-15410 | SonicWall SMA1000 Appliances | SonicWall SMA1000 Appliances Code Injection Vulnerability |
| 2026-07-14 | CVE-2026-15409 | SonicWall SMA1000 Appliances | SonicWall SMA1000 Appliances Server-Side Request Forgery Vulnerability |
| 2026-07-01 | CVE-2026-45659 | Microsoft SharePoint Server | Microsoft SharePoint Server Deserialization of Untrusted Data Vulnerability |
| 2026-06-25 | CVE-2026-12569 | PTC Windchill and FlexPLM | PTC Windchill and FlexPLM Improper Input Validation Vulnerability |
| 2026-06-12 | CVE-2026-35273 | Oracle PeopleSoft Enterprise PeopleTools | Oracle PeopleSoft Enterprise PeopleTools Missing Authentication for Critical Function Vulnerability |
Track beast in the weekly brief
One email a week: which groups are active in your sector, what they are exploiting, and what to patch. Drafted from the data on this site and read by a human before it goes out. No sales follow-up.
Data sources
- Source: CISA KEVupdated 3 hours ago
- Source: RansomLookupdated 3 hours ago
- Sector, country and region labels are inferred by SecuritySnares from the published organisation name using Claude; treat them as estimates.not yet synced
Leak-site listings reflect claims by threat actors and are not independently verified. Victims are never named on this site unless they have disclosed the incident themselves. Read the methodology.