MALICIOUS
140
Risk Score
Malware Insights
The sample is a malicious OLE document exhibiting a large slack space anomaly and a NOP sled, indicative of an exploit. Heuristics also detected XOR-encoded strings, suggesting obfuscated malicious content. The primary attack vector appears to be code execution via a vulnerability within Microsoft Word, likely leveraging VBA macros, although no specific VBA code was extracted.
Heuristics 3
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XOR-encoded strings (key 0x95) critical SC_XOR_ENCODEDFound 2 Windows library/API name(s) XOR-encoded with single-byte key 0x95: 'LoadLibraryA', 'GetProcAddress'
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NOP sled detected high SC_NOP_SLEDFound 20+ consecutive 0x90 bytes
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 502,272 bytes but its declared streams total only 16,486 bytes — 485,786 bytes (97%) 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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