MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
The sample is an OLE document with significant slack space, indicating potential obfuscation or embedded malicious content. Heuristics indicate PEB access and XOR-encoded strings, common in malware. The presence of embedded OLE objects like Excel and PowerPoint sheets further supports the idea of a malicious container. No specific family is identifiable from the provided evidence.
Heuristics 3
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XOR-encoded strings (key 0x81) critical SC_XOR_ENCODEDFound 8 Windows library/API name(s) XOR-encoded with single-byte key 0x81: 'kernel32.dll', 'kernel32.dll', 'kernel32.dll', 'kernel32.dll', 'advapi32.dll', 'advapi32.dll', 'KERNEL32.DLL', 'LoadLibraryA'
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PEB access via FS segment (x86) high SC_PEB_ACCESSPEB access via FS segment (x86)
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 246,788 bytes but its declared streams total only 60,708 bytes — 186,080 bytes (75%) 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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