S1227: StarProxy
StarProxy is custom malware used by Mustang Panda as a post-compromise tool, to enable proxying of traffic between the infected machine and other machines on the same network. [1]
Security context for executives and security teams
S1227: StarProxy describes [StarProxy](https://attack.mitre.org/software/S1227) is custom malware used by [Mustang Panda](https://attack.mitre.org/groups/G0129) as a post-compromise tool, to enable proxying of traffic between the infected machine and other machines on the same network. (Citation: Zscaler)
Executive priority
S1227: StarProxy is an official MITRE ATT&CK software. Glexia treats it as defensive behavior context for prioritizing monitoring, control validation, and response planning without using the object by itself as an attribution claim.
Technical view
Security teams should validate S1227: StarProxy by reviewing the official ATT&CK relationships, mapped tactics (the mapped ATT&CK tactic context), supported platforms (Windows), and available local telemetry before making detection or mitigation decisions.
Likely telemetry
- Official ATT&CK relationships and object metadata
- Network, endpoint, and security-tool telemetry
Detection direction
- Validate whether S1227: StarProxy appears in your detection coverage and tabletop scenarios.
- Use the object to align executive risk language with SOC, incident response, and detection engineering work.
- Do not treat ATT&CK relationship context as attribution without corroborating evidence.
Mitigation priorities
- Map the object to existing controls and identify missing telemetry or response ownership.
- Prioritize mitigations that reduce exposure on the listed platforms and tactics.
- Review adjacent ATT&CK relationships before changing policy, detections, or reporting language.
Additional notes and limits
Baseline Glexia take generated from the official MITRE ATT&CK STIX object, source hash, tactics, platforms, and detection fields. It is safe to replace with a richer model-generated take for the same source hash later.
This baseline take is source-grounded and schema-validated, but it does not include environment-specific telemetry, incident evidence, or threat-intelligence corroboration.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
StarProxy
StarProxy is custom malware used by Mustang Panda as a post-compromise tool, to enable proxying of traffic between the infected machine and other machines on the same network. [1]
How security teams should use this page
Treat this object as behavior context, not an attribution claim. Validate the related groups, software, data sources, and mitigations against official ATT&CK relationships and your own telemetry before making control-coverage decisions.
Techniques used
This mirrors the MITRE pattern of making group, software, campaign, and technique relationships scannable. Relationship notes come from mirrored ATT&CK relationship text when available.
| Domain | ID | Name | Relationship / procedure |
|---|---|---|---|
| Enterprise | T1573.001 | Symmetric CryptographySub-technique | |
| Enterprise | T1574.001 | DLLSub-technique | |
| Enterprise | T1059 | Command and Scripting Interpreter | |
| Enterprise | T1001.003 | Protocol or Service ImpersonationSub-technique | |
| Enterprise | T1106 | Native API | |
| Enterprise | T1124 | System Time Discovery | |
| Enterprise | T1090.001 | Internal ProxySub-technique | |
| Enterprise | T1095 | Non-Application Layer Protocol | |
| Enterprise | T1140 | Deobfuscate/Decode Files or Information |
Groups, software, and campaigns
G0129: Mustang Panda
Mustang Panda is a China-based cyber espionage threat actor that has been conducting operations since at least 2012. Mustang Panda has been known to use tailored phishing lures and decoy documents to deliver malicious payloads. Mustang Panda has targeted government, diplomatic, and non-governmental organizations, including think tanks, religious institutions, and research entities, across the United States, Europe, and Asia, with notable activity in Russia, Mongolia, Myanmar, Pakistan, and Vietnam. [1][2][3][4][5][6][7][8][9][10][11][12][13]
All related ATT&CK context
Object version and sync metadata
The fields below describe the current mirrored snapshot. When Glexia retains multiple ATT&CK source imports, you can open the table to compare the same object across releases (hashes and MITRE timestamps). For MITRE’s own release notes and roadmap, see ATT&CK resources — Updates.
Imported snapshots across ATT&CK releases(2)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 19.2 | 1.0 | Current bundle | b4fc075ef486… | ||
| 19.1 | 1.0 | Older bundle | b4fc075ef486… |
Mirrored ATT&CK source object
The raw object is retained through the mirrored ATT&CK source bundle and object hash. The raw endpoint returns the exact object from the mirrored bundle when available.
External references and citations
MITRE external references are preserved separately from Glexia analysis so citations remain traceable to their original source records.
- [1]Zscaler
Sudeep Singh. (2025, April 16). Latest Mustang Panda Arsenal: ToneShell and StarProxy | P1. Retrieved July 21, 2025.
Open source URL - [2]mitre-attackS1227Open source URL
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