Ransomware group profile · #168 by claimed victims
Mountlocker ransomware
MountLocker operated as a ransomware-as-a-service from July 2020, using a standard developer/affiliate revenue split and leveraging compromised RDP credentials for initial access, propagating laterally via Windows Active Directory APIs and targeting over 2,600 file extensions.
Victimology
Who Mountlocker claims to have breached, from 18 leak-site posts recorded by VULONE.
Claims per month last 12 months
Top sectors
Top countries
Latest claimed victims 12 most recent
| Victim | Sector | Country | Claimed |
|---|---|---|---|
| Dassault Falcon Jet | Manufacturing | — | 8 Feb 2022 |
| Memry Corporation | Manufacturing | — | 9 Sep 2021 |
| ThyssenKrupp System Engineering | Manufacturing | — | 9 Sep 2021 |
| Century 3, Inc. century 3, inc. | Manufacturing | — | 9 Sep 2021 |
| Amey plc | Transportation | — | 9 Sep 2021 |
| Transtar1 | Transportation | — | 9 Sep 2021 |
| Wasserstorm | Retail & E-Commerce | — | 9 Sep 2021 |
| MERSEN | Manufacturing | — | 9 Sep 2021 |
| Geotech Engineering and Testing | Professional Services | — | 9 Sep 2021 |
| Laboratorios SMA S.A.C. laboratorios sma s.a.c. | Healthcare | — | 9 Sep 2021 |
| Makalot | Manufacturing | — | 9 Sep 2021 |
| Gunnebo AB | Manufacturing | — | 9 Sep 2021 |
All 18 Mountlocker victims, searchable
Full victim list with claim posts, domains, timing and exports, plus the negotiation chats and leak-site screenshots VULONE archives for this crew.
Tactics, techniques and procedures
ATT&CK technique mapping for Mountlocker is in progress. Victimology, infrastructure status and leak-site tracking are live above.
Indicators, detections and the full playbook
Hashes, C2 addresses, onion services, Sigma and YARA detections per technique, and the negotiation transcripts are available to signed-in analysts.
Frequently asked
Is Mountlocker ransomware still active?
How many victims has Mountlocker claimed?
Which industries does Mountlocker target?
Which countries are most affected by Mountlocker?
Where does VULONE get Mountlocker victim data?
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ClopVictim claims are collected from leak sites and enrichment partners (ransomware.live, RansomLook) and represent the group's own assertions, not confirmed breaches. Profile last updated 16 September 2026. Questions or corrections: [email protected].
