Author

Youji Fukuta

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Open access Aug 2026

An Explainable Deep Learning Pipeline for Malware Family Classification: GAF Image Encoding and API-Grounded LLM Interpretation

Signature-based malware detection is undermined by obfuscation and packing, motivating dynamic analysis of Application Programming Interface (API) call sequences. Existing image-based classifiers reach high accuracy but rarely explain why a sample belongs to a given family. In this paper, our goal is not to maximize cl...

Youji Fukuta, Yoshiaki Shiraishi, Masanori Hirotomo et al. · Electronics · 0 citations

Open access Sep 2026

WinAPIReplay: Safely Re-Executing Win32 and NT-Native Malware API-Call Logs to Measure Behavioral Reproducibility and Generate Labeled Endpoint Telemetry

Behavioral malware analysis relies on dynamic-analysis logs—sequences of Windows API calls recorded by sandboxes such as CAPEv2—assumed to represent the malware’s effects faithfully. To the best of our knowledge, this assumption has never been tested by re-executing the recorded calls. We propose WinAPIReplay, which re...

Youji Fukuta, Yoshiaki Shiraishi, Masanori Hirotomo et al. · Information · 0 citations