S9062: MiniBrowse
MiniBrowse is a custom stealer designed for the theft of credentials in browsers and passwords stores. MiniBrowse was first observed in late-2025.[1] MiniBrowse has been affiliated with the cyber espionage threat group NIMBUS MANTICORE.[1]
Security context for executives and security teams
S9062: MiniBrowse describes [MiniBrowse](https://attack.mitre.org/software/S9062) is a custom stealer designed for the theft of credentials in browsers and passwords stores. [MiniBrowse](https://attack.mitre.org/software/S9062) was first observed in late-2025.(Citation: CheckPoint_NimbusManticoreEurope_Sept2025) [MiniBrowse](https://attack.mitre.org/software/S9062) has been affiliated with the cyber espionage threat group [NIMBUS MANTICORE](https://attack.mitre.org/groups/G1059).(Citation: CheckPoint_NimbusManticoreEurope_Sept2025)
Executive priority
S9062: MiniBrowse 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 S9062: MiniBrowse 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 S9062: MiniBrowse 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.
MiniBrowse
MiniBrowse is a custom stealer designed for the theft of credentials in browsers and passwords stores. MiniBrowse was first observed in late-2025.[1] MiniBrowse has been affiliated with the cyber espionage threat group NIMBUS MANTICORE.[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 | T1555.003 | Credentials from Web BrowsersSub-technique | MiniBrowse has stolen credentials from Chrome and Edge browsers.[1] |
| Enterprise | T1033 | System Owner/User Discovery | MiniBrowse has the ability to gather the username associated with the victim host.[1] |
| Enterprise | T1559 | Inter-Process Communication | MiniBrowse has sent JSON files to a named pipe.[1] |
| Enterprise | T1027.016 | Junk Code InsertionSub-technique | MiniBrowse contains obfuscated code leveraging junk code insertion.[1] |
| Enterprise | T1027.013 | Encrypted/Encoded FileSub-technique | MiniBrowse has encrypted strings that obfuscate code.[1] |
| Enterprise | T1041 | Exfiltration Over C2 Channel | MiniBrowse has the ability to upload stolen data over C2 communications.[1] |
| Enterprise | T1071.001 | Web ProtocolsSub-technique | MiniBrowse has utilized HTTP POST requests for communications with C2.[1] |
| Enterprise | T1069.002 | Domain GroupsSub-technique | MiniBrowse has collected the domain associated with the victim system.[1] |
| Enterprise | T1027 | Obfuscated Files or Information | MiniBrowse has obfuscated code leveraging junk code insertion, control-flow obfuscation, opaque predicates, obfuscated function calls, and encrypted strings to hinder analysis.[1] |
| Enterprise | T1217 | Browser Information Discovery | MiniBrowse has gathered browser data to include Edge login data.[1] |
| Enterprise | T1059.007 | JavaScriptSub-technique | MiniBrowse has leveraged JSON to exfiltrate data.[1] |
Groups, software, and campaigns
G1059: NIMBUS MANTICORE
NIMBUS MANTICORE is a State Sponsored cyber espionage group associated with the Iranian Regime specifically the Iranian Revolutionary Guard Corps (IRGC). NIMBUS MANTICORE has employed social engineering attacks to include HR related themes and has leveraged custom malware against its victims. NIMBUS MANTICORE has sought sensitive information in victims’ environments to include network/IT documentation, intellectual property and emails. NIMBUS MANTICORE has also leveraged compromised organizations as pivot points to access other organizations of interest. NIMBUS MANTICORE has been active since 2021 and has targeted critical infrastructure organizations to include aviation, aerospace, telecommunications and defense and information technology related organizations within the United States, Australia, Midde East and Europe.[1][2][3][4]
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(1)
| Release | Bundle imported | Object version | Modified | Status | Raw hash |
|---|---|---|---|---|---|
| 20.0 | 1.0 | Current bundle | 8b1c2b5f7e88… |
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]CheckPoint_NimbusManticoreEurope_Sept2025
Check Point. (2025, September 22). Nimbus Manticore Deploys New Malware Targeting Europe. Retrieved September 24, 2026.
Open source URL - [2]mitre-attackS9062Open source URL
Source: MITRE ATT&CK®. © 2026 The MITRE Corporation. This work is reproduced and distributed with the permission of The MITRE Corporation. MITRE ATT&CK and ATT&CK are registered trademarks of The MITRE Corporation. Glexia is not affiliated with or endorsed by MITRE.