MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is a malicious Microsoft Word document exhibiting several high-risk heuristics. The presence of a NOP sled and XOR-encoded strings suggests an attempt to obfuscate and execute shellcode. The large amount of slack space in the OLE structure is also indicative of a packed or obfuscated payload, likely intended to exploit a client execution vulnerability.
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 397,385 bytes but its declared streams total only 16,486 bytes — 380,899 bytes (96%) 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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