# StormStealer

> As of 2026-05-30, StormStealer is a Russia-nexus threat actor tracked by Threadlinqs Intelligence across 1 threat spanning malware. Also known as Storm MaaS, Gunnar build operator.

- **Nation:** Russia
- **Tracked threats:** 1
- **Categories:** MALWARE
- **Also known as:** Storm MaaS, Gunnar build operator
- **As of:** 2026-05-30

## Tracked threats

- [Storm Infostealer (v0.0.2.0 Gunnar): Server-Side Browser Decryption Bypasses Chrome App-Bound Encryption and Hijacks MFA-Protected SaaS Sessions](https://intel.threadlinqs.com/threat/TL-2026-0355) — HIGH

## 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/StormStealer