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

Static analysis result for SHA-256 6d767dcfcfebf315…

MALICIOUS

Office (OOXML) / .XLSX

726.8 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-07-27
MD5: ef51ca4bb5121aff225a29c0be9a21fe SHA-1: e10ee3dc7b77519fd0595874f6342f95cc6c56ca SHA-256: 6d767dcfcfebf31572d95de497b326918a49f6662b9da1e640760628756f7d49
100 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The file is an Excel document containing a suspicious OLE object, specifically identified as an Equation Editor object with an anomalous Ole10Native stream. This structure strongly suggests the object is designed to carry and execute a malicious payload, likely exploiting a vulnerability in the Equation Editor component. The embedded OLE object and its unusual stream are the primary indicators of malicious intent.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/nQ11zrs.obFQ4 contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALY
    Embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is an exploit-shaped Equation/OLE payload container seen in malicious OOXML samples. It is not assigned to a specific CVE unless the MTEF/Equation Native primitive also matches.
  • 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
c09e17b55fb11cf16f6e82e416a50aac58b14e1c8ded6585da4f24f6993f623a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/nQ11zrs.obFQ4 1006080 bytes
ooxml_oleobject_00_ole10native_00.bin
e8bec0bdd980629528c12a399d9a40e5542574a34bddc90b244a655f09b2f1ff		 ole-package OOXML xl/embeddings/nQ11zrs.obFQ4 Ole10Native stream: ole10nAtIVe 995393 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.