# UNC5337: threat group profile

> UNC5337 is a threat group thought to operate from China. Public reporting about it is still limited. This free profile brings together what is known about it, so you can judge the risk to you. It lists the other names the group goes by and links to every public report behind it.

Canonical page: https://www.edgeprotect.io/threat-actors/unc5337
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## At a glance

| Fact | Value |
|---|---|
| Attack techniques | 0 |
| Thought to operate from | China |
| Other names | 0 |
| Public reports | 1 |

## Who is UNC5337?

UNC5337 is a threat group thought to operate from China. Public reporting about it is still limited.

### What public reporting says

> UNC5337 is a suspected China-nexus espionage actor that compromised Ivanti Connect Secure VPN appliances as early as Jan. 2024. UNC5337 is suspected to exploit CVE-2023-46805 (authentication bypass) and CVE-2024-21887 (command injection) for infecting Ivanti Connect Secure appliances. UNC5337 leveraged multiple custom malware families including the SPAWNSNAIL passive backdoor, SPAWNMOLE tunneler, SPAWNANT installer, and SPAWNSLOTH log tampering utility. Mandiant suspects with medium confidence that UNC5337 is UNC5221.

## Public reports about UNC5337

- https://cloud.google.com/blog/topics/threat-intelligence/ivanti-post-exploitation-lateral-movement

## Frequently asked questions

### Who is UNC5337?

UNC5337 is a threat group thought to operate from China. Public reporting about it is still limited.

### Where is UNC5337 thought to be based?

Public reporting places UNC5337 as operating from China. Attribution is never certain: it rests on the tools, infrastructure and targets researchers have seen.

### How do I know if UNC5337 is a risk to my business?

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