Storm-2603

Introduction

The group Microsoft tracks as Storm-2603 is assessed with medium confidence to be a China-based threat actor. Microsoft has not identified links between Storm-2603 and other known Chinese threat actors. Microsoft tracks this threat actor in association with attempts to steal MachineKeys via the on-premises SharePoint vulnerabilities. Although Microsoft has observed this threat actor deploying Warlock and Lockbit ransomware in the past, Microsoft is currently unable to confidently assess the threat actor’s objectives. Additional actors may use these exploits to target unpatched on-premises SharePoint systems, further emphasizing the need for organizations to implement mitigations and security updates immediately.

Activities and Tactics

Country of Origin: 🇨🇳 China

Notable Campaigns

Information pending cataloguing.

Tactics, Techniques, and Procedures (TTPs)

Ransomware Vulnerability Matrix observations

Notable Indicators of Compromise (IOCs)

No curated IOCs are currently published for this actor. This section will be updated when stable, attributable indicators are available.

Malware and Tools

• China Chopper
• Xploit

Attribution and Evidence

Country of Origin: China Additional attribution information pending cataloguing.

References

References pending cataloguing.