MALICIOUS
80
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The OLE document exhibits characteristics of an appended payload, with a significant portion of the file's slack space containing executable-looking bytes. This suggests the Excel file is a dropper or loader for a secondary malicious component. The high slack space and appended payload heuristics indicate a high likelihood of malicious intent, likely delivered via spearphishing.
Heuristics 2
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 109,592 bytes but its declared streams total only 24,565 bytes — 85,027 bytes (78%) live in unallocated sector slack. This is the canonical hiding place for pre-macro-era Office exploit payloads (XOR-encoded shellcode reached via a parser pointer-corruption bug in the document structure).
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OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOADOLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
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