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README.md
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pretty_name: MELD-DS-
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license: cc-by-nc-sa-4.0
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language:
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- en
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- other
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# Appendix: MELD-DS-
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## Dataset Overview
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MELD-DS-
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**Family Distribution Characteristics**: The dataset exhibits a typical long-tail distribution, with 35.7% singleton families (only 1 sample) and 65.0% small-scale families (≤5 samples). Head concentration is significant, with the top 5 families covering 44.6% of samples and the top 10 families covering 57.1% of samples. Major families include unknown (4,517 samples, 17.6%), LummaStealer (2,903 samples, 11.3%), Formbook (2,057 samples, 8.0%), and others.
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## Standardized Analysis Artifacts
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Each sample in MELD-DS-
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**1. CAPE JSON Reports** - Complete structured analysis results containing behavioral indicators, network activities, file system operations, registry modifications, and process execution traces, as the original analysis reports from CAPEv2.
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pretty_name: MELD-DS-455
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license: cc-by-nc-sa-4.0
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language:
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- en
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- other
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# Appendix: MELD-DS-455 Dataset Overview
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## Dataset Overview
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MELD-DS-455 contains **25,722 malicious samples** spanning **454 distinct malware families** collected from April 2020 to August 2025. All samples are uniquely identified by SHA-256 hashes and include precise "First Seen" timestamps.
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**Family Distribution Characteristics**: The dataset exhibits a typical long-tail distribution, with 35.7% singleton families (only 1 sample) and 65.0% small-scale families (≤5 samples). Head concentration is significant, with the top 5 families covering 44.6% of samples and the top 10 families covering 57.1% of samples. Major families include unknown (4,517 samples, 17.6%), LummaStealer (2,903 samples, 11.3%), Formbook (2,057 samples, 8.0%), and others.
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## Standardized Analysis Artifacts
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Each sample in MELD-DS-455 provides four types of standardized analysis data generated through unified CAPE Sandbox analysis in virtualized Windows 10 x64 (22H2) environments:
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**1. CAPE JSON Reports** - Complete structured analysis results containing behavioral indicators, network activities, file system operations, registry modifications, and process execution traces, as the original analysis reports from CAPEv2.
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