Malicious Office (OOXML) / .XLSX — malware analysis report

Static analysis result for SHA-256 1c7f9e1ddbeb5763…

MALICIOUS

Office (OOXML) / .XLSX

650.1 KB Created: 2024-03-25 10:30:17 UTC Authoring application: Microsoft Excel 12.0000
MD5: 20cd144a2480508f15fa0a287a842081 SHA-1: 2e74db7023b5e20e5040c191bda120abb7bf6d3e SHA-256: 1c7f9e1ddbeb5763d76a305137bc720bf2764a199bee64c644ebcef4febdba19
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The primary finding is a high-severity heuristic indicating an embedded Equation Editor OLE object within the XLSX file. This is a common technique used to deliver exploits, often targeting vulnerabilities in the Equation Editor component itself. The presence of an embedded OLE object further supports this attack vector.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/hIInzlzbB.prIrFo contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • 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
4cc11af1a6b5bfd607dadafc8c6ecec0035fdc3b12a9abd7d3a07ca9c5f9dc0c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/hIInzlzbB.prIrFo 932864 bytes
ooxml_oleobject_00_ole10native_00.bin
fb936cfdabf93db78eb8f7706fa5d18cfe2ab952e05a21bedc97d42a3d30b4de		 ole-package OOXML xl/embeddings/hIInzlzbB.prIrFo Ole10Native stream: oLE10NaTiVE 922876 bytes

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