Threat Actor: APT41 (Winnti Group)
APT41 (Winnti Group) is classified as an advanced Nation-State APT originating primarily from China (Ministry of State Security Contractor Syndicate / Chengdu). Driven by operational objectives spanning dual-mission operations: state espionage & financially motivated supply-chain hacking, this threat entity has maintained an active footprint from 2010 - Present. In enterprise telemetry and malware repository classification, APT41 (Winnti Group) has been corroborated across 4 distinct malware families with over 3,870 validated sample hashes.
Operational Threat Profile & Targeting
| Known Aliases | Winnti Group, Barium, Wicked Panda, Double Dragon, Brass Typhoon |
|---|---|
| Targeted Sectors | Video Game Publishers, Telecommunications, Pharmaceutical Research, High-Tech Software Vendors |
| Primary Motivations | Dual-Mission Operations: State Espionage & Financially Motivated Supply-Chain Hacking |
| Dominant Payload Categories | Rat · Hacktool · Backdoor |
| MITRE ATT&CK Reference | https://attack.mitre.org/groups/G0096/ ↗ |
Primary Observed MITRE ATT&CK Tradecraft
The following offensive techniques have been empirically verified across implants and campaign tooling weaponized by APT41 (Winnti Group):
T1059.003— weaponized across 3 catalog payload(s)T1071.001— weaponized across 3 catalog payload(s)T1055— weaponized across 2 catalog payload(s)T1056.001— weaponized across 2 catalog payload(s)T1547.001— weaponized across 2 catalog payload(s)T1574.002— weaponized across 2 catalog payload(s)T1055.001— weaponized across 1 catalog payload(s)T1055.012— weaponized across 1 catalog payload(s)T1573.002— weaponized across 1 catalog payload(s)T1021.002— weaponized across 1 catalog payload(s)T1003.001— weaponized across 1 catalog payload(s)T1105— weaponized across 1 catalog payload(s)T1082— weaponized across 1 catalog payload(s)T1571— weaponized across 1 catalog payload(s)T1113— weaponized across 1 catalog payload(s)T1125— weaponized across 1 catalog payload(s)T1091— weaponized across 1 catalog payload(s)T1543.003— weaponized across 1 catalog payload(s)T1195.002— weaponized across 1 catalog payload(s)T1014— weaponized across 1 catalog payload(s)
Exploited Vulnerabilities (CVEs)
Telemetry confirms APT41 (Winnti Group) has actively weaponized the following Common Vulnerabilities and Exposures in enterprise intrusions:
- CVE-2012-0158 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2014-1761 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2017-0199 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2017-11882 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2019-19781 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2020-0688 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2020-10189 — Technical Dossier & Exploitation Analysis (NVD ↗)
- CVE-2022-42948 — Technical Dossier & Exploitation Analysis (NVD ↗)
Attributed Catalog Malware Families (4 Families)
The following malware implants in the SystemHelpDesk catalog have been verified in operational campaigns attributed to APT41 (Winnti Group):
| Family | Category | Sample Count | Technical Summary |
|---|---|---|---|
| cobaltstrike | Hacktool | 3,500 | Cobalt Strike (specifically its Beacon payload component) is the world's most ubiquitous commercial adversary simulation and post-exploitation framework. Origin... |
| farfli | Rat | 360 | Trojan:Win32/Farfli is a sophisticated Remote Access Trojan (RAT) derived from the leaked Gh0st RAT codebase, customized extensively by Chinese state-sponsored ... |
| plugx | Rat | 8 | PlugX (also known across threat intelligence teams as Korplug or Sogu) is an exceptionally sophisticated, highly modular Remote Access Trojan first observed in ... |
| winnti | Backdoor | 2 | Backdoor:Win32/Winnti is the flagship modular cyber espionage platform and kernel rootkit family utilized by Chinese state-nexus threat group APT41 (also tracke... |
Official US Federal & CISA Advisories
Official intelligence alerts and joint cybersecurity advisories published regarding APT41 (Winnti Group) operations:
SOC Hardening & Defensive Containment
Defending enterprise perimeters against campaigns staged by APT41 (Winnti Group) requires defense-in-depth posture enforcement:
- Egress Filtering & C2 Interception: Enforce strict egress inspection and block communication to unclassified external IP blocks, fast-flux proxy relays, and dynamic DNS providers.
- Credential Isolation & Privileged Access Management: Enforce FIDO2 hardware MFA across all administrative and VPN entry points to prevent session token hijacking and password reuse.
- Attack Surface Reduction & Patch Velocity: Prioritize remediation of public-facing edge network appliances (VPN concentrators, web servers, file transfer appliances).