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

Static analysis result for SHA-256 fe852e223abc0d99…

MALICIOUS

Office (OOXML) / .XLSX

720.2 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 42f875a261c3844b177e37a1db1755f6 SHA-1: e274d79a8adad79ea4c089a825f37b68ac2e3a4a SHA-256: fe852e223abc0d9918c0be7e3efb8610ddcc184bcfcf2f274275f8598a659623
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The XLSX file contains an embedded OLE object identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities in Microsoft Office applications, often leading to the execution of arbitrary code. The presence of this object strongly suggests an attempt to deliver a malicious payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/nZrPt.WsL1h 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
91225e3479c556174c3580f28192de906129764e09faffa59fc9ef103d8263bc		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/nZrPt.WsL1h 1024512 bytes
ooxml_oleobject_00_ole10native_00.bin
1f5e85fb2302bc6d7e88044cbcf208152977f24386b196006a389f0679dbd67b		 ole-package OOXML xl/embeddings/nZrPt.WsL1h Ole10Native stream: olE10nATiVe 1013819 bytes

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