MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1027 Obfuscated Files or Information
The sample is a malicious PowerPoint file exhibiting several suspicious characteristics. High severity heuristics indicate the presence of a NOP sled and XOR-encoded strings, suggesting an attempt to hide malicious code. The large slack space in the OLE structure is also anomalous. While no document body text was available for analysis, the heuristics strongly suggest that the file contains obfuscated code, likely intended to download and execute a secondary payload. The XOR key 0x9B was identified during analysis.
Heuristics 3
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XOR-encoded strings (key 0x9B) critical SC_XOR_ENCODEDFound 5 Windows library/API name(s) XOR-encoded with single-byte key 0x9B: 'CreateProcessA', 'CreateProcessA', 'CreateProcessW', 'CreateProcessW', 'RegOpenKeyExA'
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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 1,032,708 bytes but its declared streams total only 18,081 bytes — 1,014,627 bytes (98%) 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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