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

Static analysis result for SHA-256 1dc2806a19757470…

MALICIOUS

Office (OOXML) / .XLSX

733.4 KB Created: 2024-06-12 09:57:11 UTC Authoring application: Microsoft Excel 12.0000
MD5: 29ae39c0b143a82b14eafd2e2f17330c SHA-1: e490c32e64de0ed779094f1cc1511d57d32d886c SHA-256: 1dc2806a1975747077242ad55646ab8f81245d53093f4f4130141b59b15b89f4
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object, specifically identified as an Equation Editor object. This is a high-severity finding and a common technique for exploiting vulnerabilities like CVE-2017-11882 to execute arbitrary code. The embedded 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/epEFhFUy.ICaN 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
d4b5fce36c3505b4d574667e1ca96798d8181ba13c9fa9ac6ddeb8e2e23b34e6		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/epEFhFUy.ICaN 1018368 bytes
ooxml_oleobject_00_ole10native_00.bin
dee416ea6d6fd064da0e0b9ba268391a9a230b906e49f39659a22dfd06dbd7a0		 ole-package OOXML xl/embeddings/epEFhFUy.ICaN Ole10Native stream: OLe10natIVe 1007952 bytes

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