MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
The sample is a Microsoft Word document exhibiting a large amount of slack space and a NOP sled, indicative of shellcode. The presence of XOR-encoded strings with a key of 0x95 further suggests obfuscated malicious content. These factors strongly point towards an exploit attempting to execute arbitrary code within the context of Microsoft Word.
Heuristics 3
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XOR-encoded strings (key 0x95) critical SC_XOR_ENCODEDFound 8 Windows library/API name(s) XOR-encoded with single-byte key 0x95: 'LoadLibraryA', 'LoadLibraryA', 'GetProcAddress', 'GetProcAddress', 'CreateProcessA', 'CreateProcessA', 'CreateProcessA', 'CreateProcessA'
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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 334,932 bytes but its declared streams total only 16,486 bytes — 318,446 bytes (95%) 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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