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Poseidon Group

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Aliases: Atomic, Rod Stealer • Poseidon Group is a Portuguese-speaking threat group known for extorting companies by using stolen information to blackmail them into hiring the group for security services.
Profile
Malicious
Category
Threat Actor Group
Threat Type
Unknown
Country
poseidon_group
Profile Key
The profile key is a unique identifier for this threat actor. It can be used to query the Validin APIs as the threat_key for information about this threat actor.
2026-09-15T13:37:04Z
Last Updated
At a Glance
Indicator Breakdown
Summary
Description

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.

Aliases (2)
Atomic
Alias
Rod Stealer
Alias
Targets (1)
Various
Target
External Sources
Description References (1)