S1228: PUBLOAD
PUBLOAD is a stager malware that has been observed installing itself in existing directories such as `C:\Users\Public` or creating new directories to stage the malware and its components.Citation2022 November_TrendMicro_Earth Preta_Toneshell_Pubload PUBLOAD malware collects details of the victim host, establishes persistence, encrypts victim details using RC4 and communicates victim details back to C2. PUBLOAD malware has previously been leveraged by China-affiliated actors identified as Mustang Panda. PUBLOAD is also known as “NoFive” and some public reporting identifies the loader component as CLAIMLOADER.Citation2025_IBM_PUBLOAD_TONESHELL_HIUPAN_CLAIMLOADER_MUSTANG PANDA
Security context for executives and security teams
S1228: PUBLOAD describes [PUBLOAD](https://attack.mitre.org/software/S1228) is a stager malware that has been observed installing itself in existing directories such as `C:\Users\Public` or creating new directories to stage the malware and its components.(Citation: 2022 November_TrendMicro_Earth Preta_Toneshell_Pubload) [PUBLOAD](https://attack.mitre.org/software/S1228) malware collects details of the victim host, establishes persistence, encrypts victim details using RC4 and communicates victim details back to C2. [PUBLOAD](https://attack...
Executive priority
S1228: PUBLOAD 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 S1228: PUBLOAD 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 S1228: PUBLOAD 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.
PUBLOAD
PUBLOAD is a stager malware that has been observed installing itself in existing directories such as `C:\Users\Public` or creating new directories to stage the malware and its components.Citation2022 November_TrendMicro_Earth Preta_Toneshell_Pubload PUBLOAD malware collects details of the victim host, establishes persistence, encrypts victim details using RC4 and communicates victim details back to C2. PUBLOAD malware has previously been leveraged by China-affiliated actors identified as Mustang Panda. PUBLOAD is also known as “NoFive” and some public reporting identifies the loader component as CLAIMLOADER.Citation2025_IBM_PUBLOAD_TONESHELL_HIUPAN_CLAIMLOADER_MUSTANG PANDA
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.
All related ATT&CK context
No relationships are available in the current normalized data for this object.
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.
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.
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