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

Static analysis result for SHA-256 fd4f3963a840693b…

MALICIOUS

Office (OOXML) / .XLSX

678.7 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 62a3a1aed1cf950364f5d750fbab50db SHA-1: 5a4044ee45d031f16ad9c0af1af9cd481fba1d99 SHA-256: fd4f3963a840693bc85bcdf84515462e7096876c57d837ba488c677f8a244363
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an Excel document containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests exploitation of a known vulnerability within the Equation Editor component to achieve arbitrary code execution.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/gg2eks.bYglnky 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
16a95cc3bab742b0515906616fae4971e6e6ba8e7ab4805a504a02c7f975582c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/gg2eks.bYglnky 1005056 bytes
ooxml_oleobject_00_ole10native_00.bin
61fb3f0264ea555d854845ca91e833f5aa5f8b9792d2ea966e234d0d790a2dd3		 ole-package OOXML xl/embeddings/gg2eks.bYglnky Ole10Native stream: olE10naTIVE 994420 bytes

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