MALICIOUS
100
Risk Score
Malware Insights
The sample is an Excel spreadsheet exhibiting a critical heuristic for XOR-encoded strings with a key of 0xFC. Additionally, it shows a high heuristic for OLE slack space anomaly, indicating potential obfuscation or embedded malicious content. While no document body or scripts were extracted, the presence of these heuristics strongly suggests a malicious intent, likely involving the execution of encoded commands or payloads.
Heuristics 2
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XOR-encoded strings (key 0xFC) critical SC_XOR_ENCODEDFound 3 Windows library/API name(s) XOR-encoded with single-byte key 0xFC: 'kernel32.dll', 'LoadLibraryA', 'GetProcAddress'
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 87,040 bytes but its declared streams total only 15,628 bytes — 71,412 bytes (82%) 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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