MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious due to the presence of an appended executable payload and a significant amount of slack space within the OLE structure. These characteristics are indicative of a dropper or a similar malware delivery mechanism. The XOR-encoded strings further suggest obfuscation techniques commonly employed by malware. No specific family could be identified.
Heuristics 3
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XOR-encoded strings (key 0xC2) critical SC_XOR_ENCODEDFound 2 Windows library/API name(s) XOR-encoded with single-byte key 0xC2: 'advapi32.dll', 'RegOpenKeyExA'
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OLE document has large unaccounted-for region high OLE_SLACK_ANOMALYOLE file is 91,137 bytes but its declared streams total only 16,543 bytes — 74,594 bytes (82%) 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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OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOADOLE compound file contains a large high-entropy region beyond the declared major streams and that region includes shellcode, PE, or loader API markers. This is a payload-carrier signal, not a specific CVE attribution by itself.
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