# Stonefly

> As of 2026-06-19, Stonefly is a threat actor tracked by Threadlinqs Intelligence across 3 threats spanning malware, ransomware. ATT&CK coverage spans 55 techniques across 13 tactics in 3 of 3 tracked threats. Most-observed techniques: T1082 (System Information Discovery), T1105 (Ingress Tool Transfer), T1036 (Masquerading).

- **Tracked threats:** 3
- **Categories:** MALWARE, RANSOMWARE
- **As of:** 2026-06-19

## ATT&CK techniques observed

55 techniques observed across 3 of 3 tracked threats. Tactics: Stealth (formerly Defense Evasion) (10), Command and Control (6), Discovery (6), Execution (6), Collection (5), Credential Access (5).

- [T1082](https://intel.threadlinqs.com/technique/T1082) System Information Discovery — Discovery — observed in 3 of 3 tracked threats
- [T1105](https://intel.threadlinqs.com/technique/T1105) Ingress Tool Transfer — Command and Control — observed in 3 of 3 tracked threats
- [T1036](https://intel.threadlinqs.com/technique/T1036) Masquerading — Stealth (formerly Defense Evasion) — observed in 2 of 3 tracked threats
- [T1041](https://intel.threadlinqs.com/technique/T1041) Exfiltration Over C2 Channel — Exfiltration — observed in 2 of 3 tracked threats
- [T1053](https://intel.threadlinqs.com/technique/T1053) Scheduled Task/Job — Persistence — observed in 2 of 3 tracked threats
- [T1059.001](https://intel.threadlinqs.com/technique/T1059.001) PowerShell — Execution — observed in 2 of 3 tracked threats
- [T1071.001](https://intel.threadlinqs.com/technique/T1071.001) Web Protocols — Command and Control — observed in 2 of 3 tracked threats
- [T1083](https://intel.threadlinqs.com/technique/T1083) File and Directory Discovery — Discovery — observed in 2 of 3 tracked threats
- [T1190](https://intel.threadlinqs.com/technique/T1190) Exploit Public-Facing Application — Initial Access — observed in 2 of 3 tracked threats
- [T1486](https://intel.threadlinqs.com/technique/T1486) Data Encrypted for Impact — Impact — observed in 2 of 3 tracked threats
- [T1489](https://intel.threadlinqs.com/technique/T1489) Service Stop — Impact — observed in 2 of 3 tracked threats
- [T1490](https://intel.threadlinqs.com/technique/T1490) Inhibit System Recovery — Impact — observed in 2 of 3 tracked threats
- [T1566](https://intel.threadlinqs.com/technique/T1566) Phishing — Initial Access — observed in 2 of 3 tracked threats
- [T1569.002](https://intel.threadlinqs.com/technique/T1569.002) System Services: Service Execution — Execution — observed in 2 of 3 tracked threats
- [T1003](https://intel.threadlinqs.com/technique/T1003) OS Credential Dumping — Credential Access — observed in 1 of 3 tracked threats

## Tracked threats

- [Xctdoor Backdoor Delivered via Resume-Themed LNK Files, PowerShell/VBScript Loaders, and ProximityUxHost.exe DLL Side-Loading (Andariel)](https://intel.threadlinqs.com/threat/TL-2026-0869) — HIGH
- [Lazarus Group (Stonefly) Medusa Ransomware — DPRK State-Backed Actors Deploy Medusa RaaS Targeting U.S. Healthcare](https://intel.threadlinqs.com/threat/TL-2026-0172) — CRITICAL
- [Lazarus Group Medusa Ransomware — North Korean State-Backed Extortion Targeting US Healthcare and Middle East](https://intel.threadlinqs.com/threat/TL-2026-0140) — CRITICAL

## 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/Stonefly