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Inactive · #47 by victimsRansomware group

Avaddon

As of Oct 19, 2026, Avaddon has listed 145 confirmed victims on its leak site since Jul 11, 2025, 0.4% of all victims tracked by Brandefense. Its most targeted country is United States (2.1% of its victims).

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.

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Confirmed Victims
145
Rank By Victims
#47
Last Leak-Site Post
Jul 11, 2025
Top Country
United States
Top Sector
Unknown

Victims Posted Per Month.

Avaddon confirmed victims per month
MonthConfirmed victims
July 2025145
August 20250
September 20250
October 20250
November 20250
December 20250
January 20260
February 20260
March 20260
April 20260
May 20260
June 20260
July 20260
August 20260
September 20260
October 2026 (month in progress)0
Updated continuously · figures as of Oct 19, 2026

Latest Avaddon Victims.

Search all 145 →
Latest confirmed leak-site victims claimed by Avaddon
VictimCountryIndustryData claimedPosted
EFCO formsUnknownUnknownNot stated
Town of FreeportUSUnited StatesUnknownNot stated
Presque Isle Police DepartmentUSUnited StatesUnknownNot stated
Carnegie Clean EnergyBEBelgiumUnknownNot stated
Capital Medical CenterUSUnited StatesUnknownNot stated
Cathar GamesUnknownUnknownNot stated

How They Operate.

Avaddon's threat actor profile lists 1 malware and tools, with its targets and related actors.

TTPs, CVEs and malware →

Who Avaddon Targets.

Sectors

No data for this window right now.

Countries

  1. USUnited States32.1%
  2. BEBelgium10.7%
Shares are of this group's confirmed victims.

History.


  1. First seen in Brandefense data

  2. Busiest month on record: 145 confirmed victims

  3. First confirmed victim listed on its leak site

  4. Most recent leak-site post

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Figures as of Oct 19, 2026. Confirmed leak-site claims collected by Brandefense technologies and validated by Brandefense analysts.

Listed on a leak site means a ransomware group has claimed the company; it is not a confirmed breach. To request a correction or removal, contact Brandefense.