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

Static analysis result for SHA-256 50c608c711ecbaa0…

MALICIOUS

Office (OOXML) / .XLSX

9.9 KB Created: 2023-09-27 08:05:40 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-10-26
MD5: 1fcf785d2c4b0b3cc556f0b332111ca6 SHA-1: 2e21625cea60ae91b75a2c86ddb3ae9678778d9a SHA-256: 50c608c711ecbaa083628b238671bfea5da91c4a2c35025e6f8d119e5bd3ae44
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.001 Malicious Link

The file is an Office Open XML document containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to execute arbitrary code. The embedded OLE object itself is the primary indicator of compromise.

Heuristics 2

  • 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.
  • 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
30eb833079a4ccf04d345236c414c2c7995c4b10148c9463c3620b4f5a4470dc		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
44db76401afe91ccb6f0eda7d23c577e384a27acd591ef12cb6fd6b05ab5387a		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: Ole10NATive 1827 bytes

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