Full Report
2025-01-21 • Trend Micro • Leon Chang, Theo Chen • win.cobalt_strike, win.hemigate, win.shadowpad, win.snappybee, win.sparrow_door Open article on Malpedia
Analysis Summary
This task requires summarizing information about a threat actor based on a provided article description. However, the provided context is a list of article titles, authors, dates, and associated malware names, not the full content of the article titled "Game of Emperor: Unveiling Long Term Earth Estries Cyber Intrusions."
Therefore, I must synthesize the available metadata and infer the likely focus areas necessary to populate the structured report.
Based *only* on the provided context:
* **Article Title:** "Game of Emperor: Unveiling Long Term Earth Estries Cyber Intrusions" suggests long-term, strategic espionage/intrusion activity.
* **Associated Malware (from adjacent articles/context):** `win.cobalt_strike`, `win.hemigate`, `win.shadowpad`, `win.snappybee`, `win.sparrow_door`, `MOONSHINE`, `DarkNimbus`.
* **Threat Actor Name Inference:** The title heavily implies the actor is named **Earth Estries** (or is related to a campaign named "Game of Emperor" targeting "Earth Estries"). The associated malware points towards groups known for sophisticated intrusions, often attributed to Advanced Persistent Threats (APTs).
I will structure the report based on these inferences, using placeholders where specific details (like precise motivations or strict targeting patterns) are missing from the limited context.
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# Threat Actor: Earth Estries (Inferred from Campaign Title)
## Attribution & Identity
The threat actor is related to the long-term intrusion operation detailed in the "Game of Emperor" report concerning "Earth Estries" intrusions. Associations are heavily implied by the listed malware families used in related or concurrent analysis by Trend Micro.
## Activity Summary
The activity described involves "Long Term Earth Estries Cyber Intrusions," suggesting a sustained espionage or data exfiltration campaign launched possibly under the codename "Game of Emperor." The analysis covers persistent compromise stretching over a significant period.
## Tactics, Techniques & Procedures
Specific TTPs are not detailed in the summary context, but the associated tools provide strong indications of common APT tradecraft:
- Use of commercially available penetration testing tools (Cobalt Strike).
- Deployment of custom backdoors/implant families (e.g., Hemigate, ShadowPad, SnappyBee, Sparrow Door).
- [Specific MITRE ATT&CK IDs are not present in the provided metadata.]
## Targeting
- **Sectors:** Unknown from metadata; assumed high-value targets given the "Long Term... Cyber Intrusions" description typically associated with espionage.
- **Geography:** Unknown from metadata.
- **Victims:** Unknown from metadata.
## Tools & Infrastructure
The analysis environment mentions several key pieces of malware:
- **Malware families used:** Cobalt Strike, Hemigate, ShadowPad, SnappyBee, Sparrow Door.
- **Infrastructure (C2, domains, IPs):** None explicitly listed or defanged in the provided context.
## Implications
The primary implication is the existence of a dedicated, sophisticated threat actor successfully maintaining long-term access within victim environments, indicative of a nation-state or highly resourced cyber-espionage group.
## Mitigations
Mitigations must focus on detecting and preventing the execution and communication of the identified custom malware families and countering C2 traffic associated with Cobalt Strike. Specific defenses should address:
- Detecting persistence mechanisms used by ShadowPad/Hemigate.
- Network segmentation to limit lateral movement when Cobalt Strike beacons are detected.