Quantum
Quantum is a ransomware group with a financial motive, tracked by Brandefense. It targets 18 sectors, including Government and Technology, in 13 countries, including the United States and the United Kingdom. It uses 1 MITRE ATT&CK technique.
Also known as
- QuantumLocker
- DagonLocker
- Mount-Locker
- AstroLockerr
- SunRiseLocker
- AstroLocker
- Quantum Spider
- Astro Locker Team
- Techniques
- 1
- Exploited CVEs
- No CVE data
- First seen
- Sep 9, 2021
- Last seen
- Dec 9, 2022
- Record updated
Who They Target.
Sectors · 18
Labelsransomware
About Quantum.
Quantum ransomware, active from mid-2021 through 2022, was a rebrand of the MountLocker/AstroLocker/XingLocker lineage that operated as RaaS, known for extremely fast attack timelines (under four hours from initial access to encryption) and ransom demands ranging from $150,000 to multi-million dollars.
Last updated Sep 30, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.