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G0125 · 31 ATT&CK techniques · 2 correlated reports

HAFNIUM

Aliases: HAFNIUM, Operation Exchange Marauder, Silk Typhoon

[HAFNIUM](https://attack.mitre.org/groups/G0125) is a likely state-sponsored cyber espionage group operating out of China that has been active since at least January 2021. [HAFNIUM](https://attack.mitre.org/groups/G0125) primarily targets entities in the US across a number of industry sectors, including infectious disease researchers, law firms, higher education institutions, defense contractors, policy think tanks, and NGOs. [HAFNIUM](https://attack.mitre.org/groups/G0125) has targeted remote management tools and cloud software for intial access and has demonstrated an ability to quickly operationalize exploits for identified vulnerabilities in edge devices.(Citation: Microsoft HAFNIUM March 2020)(Citation: Volexity Exchange Marauder March 2021)(Citation: Microsoft Silk Typhoon MAR 2025)

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ATT&CK techniques

Correlated CTI and IR reports

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Cyber Knowledge routes

These contextual routes explain behaviors associated with this ATT&CK group record. They support learning and investigation planning; they do not add attribution evidence.