Cyber Resilience

Threat actor · all actors

LeviathanG0065 state

🇨🇳 CN · MSS · Hainan Bureau

aka Leviathan, MUDCARP, Kryptonite Panda, Gadolinium, BRONZE MOHAWK, TEMP.Jumper, APT40, TEMP.Periscope, Gingham Typhoon, G0065, ATK29, TA423, Red Ladon, ITG09, ISLANDDREAMS, ISLAND CASTLE

Last updated: 2026-08-22

3attributed CVEs
73ATT&CK techniques
5.7IDF score (tooling uniqueness)
0exclusive CVEs
2017–2026years active

About this actor

[Leviathan](https://attack.mitre.org/groups/G0065) is a Chinese state-sponsored cyber espionage group that has been attributed to the Ministry of State Security's (MSS) Hainan State Security Department and an affiliated front company.(Citation: CISA AA21-200A APT40 July 2021) Active since at least 2009, [Leviathan](https://attack.mitre.org/groups/G0065) has targeted the following sectors: academia, aerospace/aviation, biomedical, defense industrial base, government, healthcare, manufacturing, maritime, and transportation across the US, Canada, Australia, Europe, the Middle East, and Southeast Asia.(Citation: CISA AA21-200A APT40 July 2021)(Citation: Proofpoint Leviathan Oct 2017)(Citation: FireEye Periscope March 2018)(Citation: CISA Leviathan 2024)

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

G0065

Microsoftweather-system names

Gingham Typhoon

CrowdStrikenation-animal names

Kryptonite Panda

Mandiant / genericAPT numbering

APT40

MandiantTEMP temporary cluster

TEMP.JumperTEMP.Periscope

Secureworkscolour-metal names

BRONZE MOHAWK

ProofpointTA threat-actor id

TA423

Unclassifiedno scheme matched

LeviathanMUDCARPGadoliniumATK29Red LadonITG09ISLANDDREAMSISLAND CASTLE

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 — 73 ATT&CK techniques on file.
Named victims
None on file.

See how actor data is built for the full pipeline.

Activity timeline

Profile

CVERiskCVSSEPSSPublishedProducts
CVE-2017-6328 6.98.80.02142017-08-11see CVE
CVE-2026-20929 5.97.50.01162026-01-13see CVE
CVE-2020-6789 5.87.80.00352021-03-25see CVE

Mitigating controls (NIST 800-53)

ControlTechniques coveredCoverage
SI-441 / 7356%
CM-637 / 7351%
CM-232 / 7344%
SI-332 / 7344%
AC-328 / 7338%
AC-628 / 7338%
SC-728 / 7338%
AC-426 / 7336%
CA-726 / 7336%
CM-726 / 7336%
AC-223 / 7332%
SI-220 / 7327%
AC-518 / 7325%
CM-518 / 7325%
IA-218 / 7325%

Co-occurring actors

Similar actors

Similar TTPs

Overlapping CVEs

Active in same years

Same nation-state

Same category