# UAT-8099

> As of 2026-05-30, UAT-8099 is a China-nexus threat actor tracked by Threadlinqs Intelligence across 1 threat spanning apt. Also known as WEBJACK.

- **Nation:** China
- **Tracked threats:** 1
- **Categories:** APT
- **Also known as:** WEBJACK
- **As of:** 2026-05-30

## Tracked threats

- [UAT-8099 (China) BadIIS Malware Campaign Targeting IIS Servers for SEO Fraud](https://intel.threadlinqs.com/threat/TL-2026-0007) — HIGH

## Related CVEs

8 CVEs referenced by tracked UAT-8099 activity.

- [CVE-2023-36899](https://intel.threadlinqs.com/cve/CVE-2023-36899)
- [CVE-2021-34523](https://intel.threadlinqs.com/cve/CVE-2021-34523)
- [CVE-2021-34473](https://intel.threadlinqs.com/cve/CVE-2021-34473)
- [CVE-2021-31207](https://intel.threadlinqs.com/cve/CVE-2021-31207)
- [CVE-2021-27065](https://intel.threadlinqs.com/cve/CVE-2021-27065)
- [CVE-2021-26858](https://intel.threadlinqs.com/cve/CVE-2021-26858)
- [CVE-2021-26857](https://intel.threadlinqs.com/cve/CVE-2021-26857)
- [CVE-2021-26855](https://intel.threadlinqs.com/cve/CVE-2021-26855)

## Full data

Infrastructure, IOC values and detection queries (Splunk SPL / Microsoft KQL / Sigma) require the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp

Canonical: https://intel.threadlinqs.com/actor/UAT-8099