APT ATLAS

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Atlas Actors145 Names507 Sectors40

UNC4057 (aka Callisto Group, COLDRIVER) · APT Atlas

Actors/Nation-state / APT/Europe

UNC4057

APTRU · Russia

AKA Callisto Group · COLDRIVER · SEABORGIUM · Calisto · Gossamer Bear · BlueCharlie · Dancing Salome

Secureworks: IRON FRONTIERMicrosoft: Star BlizzardCrowdStrike: BLUE CALLISTOProofpoint: TA446

Targets9

Sectors6

Threat types1

GIRs mapped0/480

Active since—

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Export

STIX 2.1 ATT&CK Navigator

QUICK FACTS

TypeNation-state / APT

OriginRussia

First seen—

Type (verbatim)nation-state APT

GIR mappings0/480

TTPs0

Targets9

Sectors6

Record updated2026-08-03

Also tracked as

5 vendor names · 7 other aliases

Open Rosetta Stone

CrowdStrike

BLUE CALLISTO

Mandiant

UNC4057

Microsoft

Star Blizzard

Proofpoint

TA446

Secureworks

IRON FRONTIER

UNATTRIBUTED ALIASESCallisto GroupCOLDRIVERSEABORGIUMCalistoGossamer BearBlueCharlieDancing Salome

Victimology

Geographic footprint · 9 countries

Export STIX

origin · Russiatargeted countries · 9

EUROPE · 8

Belgium · Switzerland · Estonia · United Kingdom · Greece · Poland · Russia · Ukraine

AMERICAS · 1

United States

Sectors targeted

6 of 40

Government100 actors Defense72 actors NGOs & Dissidents56 actors Education & Research62 actors Media & Journalism48 actors Logistics21 actors

Tactics, techniques, procedures

Threat types + MITRE ATT&CK mapping

THREAT TYPES

ESP · Espionage

MITRE ATT&CK · 0 techniques

No TTPs mapped yet.

GIR mappings

0 / 480 requirements mapped

Open matrix

No GIRs mapped yet for this actor.

References

No supporting references have been recorded for this profile. Treat uncited claims as unverified.

Open data

Machine-readable exports of this profile

JSON · RESTActor recordFull profile via the public v1 API STIX 2.1Intrusion-set bundleDeterministic ids · techniques + targeted countries ATT&CK NAVIGATORTechnique layer0 techniques · layer format 4.5

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