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Poseidon Group is a Portuguese-speaking cybercrime threat actor associated with post-compromise reconnaissance, credential theft, and PowerShell-based execution. Reported activity shows the group using an Information Gathering Tool with PowerShell components, enumerating running processes on compromised hosts, searching for local and network administrator accounts, and conducting credential dumping with particular interest in credentials associated with domain and database servers. The group has also used DNS for command-and-control in conjunction with PowerShell execution and has employed masquerading behavior, including spoofing antivirus-related processes, to support defense evasion. Available reporting supports characterization as a financially motivated criminal actor rather than a state-sponsored espionage group. The alias "Poseidon" is also used in unrelated contexts, including a Konni-attributed operation name and a separate macOS stealer lineage, and those should not be conflated with Poseidon Group.
Mallory correlates actor tradecraft and target patterns against your stack, your sector, and your geography. See overlap before they land.
Who, where, and (when attributed) which flag flies behind the operation. Pulled from open-source reporting and Mallory's analyst review.
Sectors the actor has been observed targeting.
Geographies tied to known operations.
35 distinct techniques observed across reporting, grouped by tactic. Hover any cell for the evidence excerpt; click through for MITRE's full description.
3 malware families attributed to this actor across reporting.
1 CVE this actor has used in observed campaigns. 1 of them exploited in the wild.
20 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Listed as one of many threat actors associated with the detection's ATT&CK-style annotations for PowerShell and DNS TXT command-and-control behavior; no specific campaign or activity is described in this reference.
Listed as a threat actor associated with PowerShell execution behavior relevant to this detection.
Listed as a threat actor associated with the PowerShell P/Invoke process injection API chain detection and related ATT&CK techniques.
Listed as a threat actor associated with PowerShell execution behavior relevant to this detection analytic.
Match sector + geo + tech-stack targeting against your real footprint.
Every observed MITRE ATT&CK technique, grouped by tactic.
Families this actor is known to deploy, with IOCs and behavior.
CVEs this actor has used in known campaigns.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Domains, IPs, and hashes tied to this actor, refreshed continuously.