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

Static analysis result for SHA-256 71d40149901398f8…

MALICIOUS

Office (OOXML) / .XLSX

613.4 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 10eb9f04f88c1a600a0b2871aa3e616d SHA-1: 8b05ac7a189821388f6105caed9412b2e1ae98ba SHA-256: 71d40149901398f8afc563db7d2203efeeacd2618dcc57bdd3086728d5243405
60 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an Excel file 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. No further details on the payload or specific exploit are available from static analysis.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/sJH.MWw 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
46247fe06c6e42a35855f9592de7436bcc5cae27c2d2d9624d3e92ef111559fe		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/sJH.MWw 898048 bytes
ooxml_oleobject_00_ole10native_00.bin
f5ae0676e7e0f029ff97ed42cfd01fa21f52603b31eec07dc4ed4a88513935e5		 ole-package OOXML xl/embeddings/sJH.MWw Ole10Native stream: ole10naTive 888738 bytes

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