Avaddon
Avaddon is a ransomware group with a financial motive, tracked by Brandefense. It targets 10 sectors, including Government and Technology, in 25 countries, including the United States and the United Kingdom.
Also known as
- avaddon Team
- Riddle Spider
- Techniques
- 0
- Exploited CVEs
- No CVE data
- First seen
- Mar 1, 2020
- Last seen
- Jun 11, 2021
- Record updated
Who They Target.
Sectors · 10
Countries · 25
Labelsransomware
About Avaddon.
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.
Last updated Oct 1, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.