# UAT-4356

> As of 2026-05-30, UAT-4356 is a Russia-nexus threat actor tracked by Threadlinqs Intelligence across 1 threat spanning malware. Also known as STORM-1849.

- **Nation:** Russia
- **Tracked threats:** 1
- **Categories:** MALWARE
- **Also known as:** STORM-1849
- **As of:** 2026-05-30

## Tracked threats

- [Firestarter Malware Persists on Cisco ASA/Firepower Through Firmware Updates (CVE-2025-20333, CVE-2025-20362) — UAT-4356/ArcaneDoor](https://intel.threadlinqs.com/threat/TL-2026-0422) — CRITICAL

## Related CVEs

2 CVEs referenced by tracked UAT-4356 activity.

- [CVE-2025-20362](https://intel.threadlinqs.com/cve/CVE-2025-20362)
- [CVE-2025-20333](https://intel.threadlinqs.com/cve/CVE-2025-20333)

## 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-4356