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

Static analysis result for SHA-256 8ac0387b8e277a12…

MALICIOUS

Office (OOXML) / .XLSX

592.4 KB Created: 2023-11-17 18:26:59 UTC Authoring application: Microsoft Excel 12.0000
MD5: 998d519ffcf2b532b54bc0af06ca09e5 SHA-1: 09b8c2ca04074258d7e0dfcdae3de69ac14839e0 SHA-256: 8ac0387b8e277a1215cdcfda4117629edefc7b987c8e8f76ad9e81519a19946d
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The file is an Excel spreadsheet containing an embedded OLE object identified as an Equation Editor. This is a common technique used to exploit vulnerabilities in the Equation Editor component to execute arbitrary code. The presence of this object strongly suggests the document is a malicious lure designed to deliver a secondary payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/lyPRzKbHT.zgm 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
94ef41048228d3c1818643e4974b6fde8015e9bd8c85e6f459006ec9bd9e0950		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/lyPRzKbHT.zgm 811520 bytes
ooxml_oleobject_00_ole10native_00.bin
48b25d3f4b0ca415336aaf5123bad201b9fb4ec25982856e7ddaa64cd1414950		 ole-package OOXML xl/embeddings/lyPRzKbHT.zgm Ole10Native stream: oLe10naTiVe 802422 bytes

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