APT ATLAS

Atlas Actors147 Names508 Sectors40 Requirements480

⌘K

Atlas Actors147 Names508 Sectors40 Requirements480

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

CrowdStrike: BLUE CALLISTOMicrosoft: Star BlizzardProofpoint: TA446Secureworks: IRON FRONTIER

Targets9

Sectors6

Threat types1

GIRs covered0/480

Active since—

QUICK FACTS

TypeNation-state / APT

OriginRussia

First seen—

Type (verbatim)nation-state APT

GIR coverage0/480

TTPs0

Targets9

Sectors6

Last reviewed2026-08-03

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

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 & Journalism49 actors Logistics22 actors

Tactics, techniques, procedures

Threat types + MITRE ATT&CK mapping

THREAT TYPES

ESP · Espionage

MITRE ATT&CK · 0 techniques

No TTPs mapped yet.

GIR coverage

0 / 480 requirements satisfied

Open matrix

No GIRs mapped yet for this actor.

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

Related actors

By origin and actor type

APT31nation-state

China · 6 targets · since 2013

APT8nation-state

China · 5 targets · since —

APT2nation-state

China · 6 targets · since 2010

APT24nation-state

China · 3 targets · since 2008

APT44nation-state

Russia · 25 targets · since 2009

APT21nation-state

China · 5 targets · since 2010