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

Static analysis result for SHA-256 b5906e2072c68872…

MALICIOUS

Office (OOXML) / .XLSX

3.24 MB Created: 2025-10-08 01:54:00 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2026-01-15
MD5: 580cb60d5502e16ebffcd9b1331547df SHA-1: 4447e2e9668a06dc909039c4112e710378e56db8 SHA-256: b5906e2072c688724dc03b7f5c7e3c6733ed8feea351366604af8d2d54238057
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The primary finding is a high-severity heuristic indicating an Equation Editor OLE object embedded within the XLSX file. This is a common technique used to deliver exploits, often targeting vulnerabilities in the Equation Editor component itself. The embedded OLE object is the most significant indicator of malicious intent.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/Sh1.t8lCe 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
183d6f7cf3158d3c7720004d434b6fd6c1d560e7a3cff3210341cee55c237bd8		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/Sh1.t8lCe 2953216 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.