Ransomware group profile · #49 by claimed victims
Avaddon ransomware
Avaddon is a ransomware malware targeting Windows systems often spread via malicious spam. The first known attack where Avaddon ransomware was distributed was in February 2020. Avaddon encrypts files using the extension .avdn and uses a TOR payment site for the ransom payment.
Victimology
Who Avaddon claims to have breached, from 146 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 |
|---|---|---|---|
| EFCO forms | Manufacturing | — | 9 Sep 2021 |
| Sky Leasing, LLC | Financial Services | — | 9 Sep 2021 |
| Golden Aluminum | Manufacturing | — | 9 Sep 2021 |
| J.C. Cannistraro j.c. cannistraro | Manufacturing | — | 9 Sep 2021 |
| Lonrho | Other | — | 9 Sep 2021 |
| American Bank Systems INC | Financial Services | — | 9 Sep 2021 |
| Brown Robert LLP | Professional Services | — | 9 Sep 2021 |
| National AIDS Control Council | Government & Defense | — | 9 Sep 2021 |
| Monterey Bay Air Resources District | Government & Defense | — | 9 Sep 2021 |
| Dade City Florida | Government & Defense | — | 9 Sep 2021 |
| KOE | Not Found | — | 9 Sep 2021 |
| AHT Global | Professional Services | — | 9 Sep 2021 |
All 146 Avaddon 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 Avaddon 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 Avaddon ransomware still active?
How many victims has Avaddon claimed?
Which industries does Avaddon target?
Which countries are most affected by Avaddon?
Where does VULONE get Avaddon 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].
