Full Report
2025-05-07 • NTT Security • Masaya Motoda, Rintaro Koike • js.beavertail, js.otter_cookie, py.invisibleferret Open article on Malpedia
Analysis Summary
The provided context describes an article detailing "Additional Features of OtterCookie Malware Used by WaterPlum." However, the context is extremely brief and only provides metadata, authors, organization, and links to related malware entries (js.beavertail, js.otter\_cookie, py.invisibleferret) and external articles. **It does not contain the specific technical details, techniques, MITRE ATT&CK mappings, indicators of compromise, or detailed capabilities necessary to populate the requested summary structure fully.**
Therefore, the summary below is populated using the explicit information available regarding the malware family and associated actor, while placeholders are used for the missing technical details based on the provided context structure. The related malware listed in the context will be included in the appropriate section.
# Tool/Technique: OtterCookie Malware
## Overview
OtterCookie is a malware family utilized by the WaterPlum threat group. This analysis focuses on additional features discovered associated with its operation.
## Technical Details
- Type: Malware family
- Platform: Unknown (Context does not specify OS/Architecture, likely targets Windows given typical APT behavior, but unconfirmed)
- Capabilities: Functionality details are not provided in the context.
- First Seen: Date not provided in the context.
## MITRE ATT&CK Mapping
*(MITRE ATT&CK mappings are not present in the source context.)*
- [TBD - Tactic Name]
- [T#### - Technique Name]
## Functionality
### Core Capabilities
- Unknown based on the provided context snippet.
### Advanced Features
- Unknown based on the provided context snippet.
## Indicators of Compromise
*(Specific IOCs are not present in the source context.)*
- File Hashes: [Not Available]
- File Names: [Not Available]
- Registry Keys: [Not Available]
- Network Indicators: [Not Available]
- Behavioral Indicators: [Not Available]
## Associated Threat Actors
- WaterPlum
## Detection Methods
*(Specific detection information is not present in the source context.)*
- Signature-based detection: [Not Available]
- Behavioral detection: [Not Available]
- YARA rules: [Not Available]
## Mitigation Strategies
*(Mitigation strategies are not present in the source context.)*
- Prevention measures: [Not Available]
- Hardening recommendations: [Not Available]
## Related Tools/Techniques
- js.beavertail
- js.otter\_cookie
- py.invisibleferret