# UNK_MassTraction

> As of 2026-07-13, UNK_MassTraction is a China-nexus threat actor tracked by Threadlinqs Intelligence across 2 threats spanning campaign, vulnerability. ATT&CK coverage spans 42 techniques across 14 tactics in 2 of 2 tracked threats. Most-observed techniques: T1005 (Data from Local System), T1070 (Indicator Removal), T1082 (System Information Discovery).

- **Nation:** China
- **Tracked threats:** 2
- **Categories:** CAMPAIGN, VULNERABILITY
- **As of:** 2026-07-13

## ATT&CK techniques observed

42 techniques observed across 2 of 2 tracked threats. Tactics: Stealth (formerly Defense Evasion) (6), Command and Control (5), Execution (5), Credential Access (4), Initial Access (4), Collection (3).

- [T1005](https://intel.threadlinqs.com/technique/T1005) Data from Local System — Collection — observed in 2 of 2 tracked threats
- [T1070](https://intel.threadlinqs.com/technique/T1070) Indicator Removal — Stealth (formerly Defense Evasion) — observed in 2 of 2 tracked threats
- [T1082](https://intel.threadlinqs.com/technique/T1082) System Information Discovery — Discovery — observed in 2 of 2 tracked threats
- [T1090](https://intel.threadlinqs.com/technique/T1090) Proxy — Command and Control — observed in 2 of 2 tracked threats
- [T1111](https://intel.threadlinqs.com/technique/T1111) Multi-Factor Authentication Interception — Credential Access — observed in 2 of 2 tracked threats
- [T1140](https://intel.threadlinqs.com/technique/T1140) Deobfuscate/Decode Files or Information — Stealth (formerly Defense Evasion) — observed in 2 of 2 tracked threats
- [T1190](https://intel.threadlinqs.com/technique/T1190) Exploit Public-Facing Application — Initial Access — observed in 2 of 2 tracked threats
- [T1531](https://intel.threadlinqs.com/technique/T1531) Account Access Removal — Impact — observed in 2 of 2 tracked threats
- [T1539](https://intel.threadlinqs.com/technique/T1539) Steal Web Session Cookie — Credential Access — observed in 2 of 2 tracked threats
- [T1571](https://intel.threadlinqs.com/technique/T1571) Non-Standard Port — Command and Control — observed in 2 of 2 tracked threats
- [T1620](https://intel.threadlinqs.com/technique/T1620) Reflective Code Loading — Stealth (formerly Defense Evasion) — observed in 2 of 2 tracked threats
- [T1036](https://intel.threadlinqs.com/technique/T1036) Masquerading — Stealth (formerly Defense Evasion) — observed in 1 of 2 tracked threats
- [T1036.005](https://intel.threadlinqs.com/technique/T1036.005) Match Legitimate Resource Name or Location — Stealth (formerly Defense Evasion) — observed in 1 of 2 tracked threats
- [T1041](https://intel.threadlinqs.com/technique/T1041) Exfiltration Over C2 Channel — Exfiltration — observed in 1 of 2 tracked threats
- [T1056](https://intel.threadlinqs.com/technique/T1056) Input Capture — Collection — observed in 1 of 2 tracked threats

## Tracked threats

- [UNK_MassTraction: China-Aligned Actor Exploits Roundcube CVE-2024-42009 & CVE-2025-49113 to Deploy IceCube Stealer and VShell Against University Physics Departments](https://intel.threadlinqs.com/threat/TL-2026-1259) — HIGH
- [UNK_MassTraction Exploits Roundcube XSS/Deserialization Flaws (CVE-2024-42009, CVE-2025-49113) to Spy on Academic Researchers](https://intel.threadlinqs.com/threat/TL-2026-1162) — HIGH

## Related CVEs

2 CVEs referenced by tracked UNK_MassTraction activity.

- [CVE-2025-49113](https://intel.threadlinqs.com/cve/CVE-2025-49113)
- [CVE-2024-42009](https://intel.threadlinqs.com/cve/CVE-2024-42009)

## 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/UNK_MassTraction