MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1027 Obfuscated Files or Information
The sample exhibits characteristics of a malicious document, including a NOP sled and XOR-encoded strings, suggesting an attempt to obfuscate malicious content. The large slack space in the OLE structure further points to potential embedded malicious components. The XOR key 0x84 was identified during analysis.
Heuristics 3
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XOR-encoded strings (key 0x84) critical SC_XOR_ENCODEDFound 1 Windows library/API name(s) XOR-encoded with single-byte key 0x84: 'kernel32.dll'
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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 353,886 bytes but its declared streams total only 16,486 bytes — 337,400 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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