Cyber threats / Threat actors

UNC4540

CN Suspected sponsor: China
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APAC targets
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Techniques
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Incidents
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News · 30d
Profile

UNC4540 is a suspected Chinese threat actor targeting unpatched SonicWall Secure Mobile Access appliances to deploy custom malware that establishes long-term persistence for cyber espionage. The malware is designed to steal hashed credentials, provide shell access, and persist through firmware upgrades, utilizing a variant of the TinyShell backdoor. Mandiant has tracked UNC4540's activities back to 2021, noting their focus on maintaining access to compromised devices. The group's tactics are consistent with patterns observed in other Chinese threat actor campaigns targeting network devices for zero-day exploits.

ATT&CK techniques
MITRE ATT&CK has no technique mapping for this actor.
Incidents attributed
  • No incident in the register is attributed to this actor.
In the news
  • No Asia-Pacific article names this actor yet.
Targets
No victim countries in the sources.
Relevance to the EU
EU relevance: Low
No EU member state among its known victims and no overlap with EU projects
No EU cooperation projects recorded in its target countries.
References
Sources: MISP