Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 b5dbb1f556907e45…

MALICIOUS

Office (OOXML)

12.5 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300 First seen: 2021-02-23
MD5: 4a4f502823e7db7649bd729a663148b7 SHA-1: 0c01c9e60e402b7817c8401ecc507d87477766ca SHA-256: b5dbb1f556907e45f95296b3d01a954587d3b50d33f5aadc2b75a6eedf4568fc
100 Risk Score

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • Embedded OLE object medium OOXML_OLE_OBJECT
    Document contains an embedded OLE object

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
SHA-256: 1f0cf0d66ccde1d4efe82186b6f34b98d285c7eec74feb0233957be40c278df0
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: olE10NaTIVe 1891 bytes
SHA-256: f4cc325c01d3f791cee40c0190b476eb49b8c608211ffad5ff64af517db41d78

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