Poseidon Group
Poseidon Group is a Brazil-attributed nation-state APT group with an espionage motive, tracked by Brandefense. It targets 10 sectors, including Government and Manufacturing, in 11 countries, including the United States and India. It uses 9 MITRE ATT&CK techniques.
Also known as
- G0033
- Origin
- Brazil
- Techniques
- 9
- Exploited CVEs
- No CVE data
- First seen
- Jan 1, 2005
- Last seen
- Feb 9, 2016
- Record updated
Who They Target.
Sectors · 10
Labelsespionageglobal
About Poseidon Group.
Poseidon Group is a Portuguese-speaking threat group that has been active since at least 2005. The group has a history of using information exfiltrated from victims to blackmail victim companies into contracting the Poseidon Group as a security firm.
Last updated Sep 19, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.