MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is a malicious Microsoft Word document that exhibits characteristics of an exploit. Heuristics indicate the presence of a NOP sled and XOR-encoded strings, suggesting shellcode execution. The large amount of slack space in the OLE structure is also indicative of obfuscation or embedded exploit code. No specific family could be identified.
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 221,696 bytes but its declared streams total only 16,486 bytes — 205,210 bytes (93%) 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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