Cyber Resilience

Threat actor · all actors

Poseidon GroupG0033 state

🇧🇷 BR

aka Poseidon Group, G0033

Last updated: 2026-08-20

0attributed CVEs
11ATT&CK techniques
0.0IDF score (tooling uniqueness)
0exclusive CVEs
—years active

About this actor

[Poseidon Group](https://attack.mitre.org/groups/G0033) 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](https://attack.mitre.org/groups/G0033) as a security firm. (Citation: Kaspersky Poseidon Group)

Source: MITRE ATT&CK

Names & naming systems

Each vendor coins its own name for the same actor. Where a name follows a known scheme we attribute it; the rest are listed honestly as unclassified.

MITRE ATT&CKG-number catalogue id

G0033

Unclassifiedno scheme matched

Poseidon Group

How we know this

Data origin
MITRE ATT&CK Imported from the MITRE ATT&CK STIX bundle as an intrusion-set object.
Techniques
MITRE ATT&CK STIX mappings — 11 ATT&CK techniques on file.
Named victims
None on file.

See how actor data is built for the full pipeline.

Activity timeline

No activity events recorded.

Profile

CVERiskCVSSEPSSPublishedProducts
No attributed CVEs.

Mitigating controls (NIST 800-53)

ControlTechniques coveredCoverage
CM-68 / 1173%
SI-48 / 1173%
CM-77 / 1164%
AC-26 / 1155%
AC-35 / 1145%
AC-65 / 1145%
CM-25 / 1145%
SI-35 / 1145%
SI-75 / 1145%
CA-74 / 1136%
IA-94 / 1136%
SI-104 / 1136%
AC-53 / 1127%
CM-53 / 1127%
IA-23 / 1127%

Co-occurring actors

None.

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Similar TTPs

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