Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 61c3d3c8fa5af3c9…

MALICIOUS

Office (OLE)

145.0 KB Created: 2011-05-12 09:56:45 Authoring application: Microsoft Excel First seen: 2014-02-09
MD5: eba37370d9366d71863a77a04031de62 SHA-1: 486b01914ff0ce3b7274dcf5023972b1d8341ce1 SHA-256: 61c3d3c8fa5af3c9b53fcf9fb242a28bb64928b0962dec7bed1946b5bba6da51
80 Risk Score

Heuristics 2

  • OLE document has large unaccounted-for region high OLE_SLACK_ANOMALY
    OLE file is 148,480 bytes but its declared streams total only 29,612 bytes — 118,868 bytes (80%) 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).
  • OLE file has appended executable-looking payload bytes high OLE_APPENDED_PAYLOAD
    OLE 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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