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

Static analysis result for SHA-256 5782089834d012d5…

MALICIOUS

Office (OOXML) / .XLSX

692.5 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-01-24
MD5: 754a359d83eab382d6ae700f661a16db SHA-1: 9b130a45922eecc4a0979f93e328e97fdb55f184 SHA-256: 5782089834d012d57b4be138a2d3018b992a8f29aac091f974c6fefea6b37635
100 Risk Score

Malware Insights

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

The sample is an OOXML file containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. Heuristics indicate that this Equation Editor object carries a payload-like Ole10Native stream, suggesting it's being used to exploit a vulnerability. The embedded OLE object and its anomalous Ole10Native stream are strong indicators of a malicious exploit delivery mechanism.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/xMp.UL 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
79d327155b86c073b25e805bbf3ce429c22097e7a8bf57805610364e68e6ffbe		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/xMp.UL 967680 bytes
ooxml_oleobject_00_ole10native_00.bin
686fa907f2767ac0c779ce50b70c0f890bca1f0697a9369bf48a69d6a2c64672		 ole-package OOXML xl/embeddings/xMp.UL Ole10Native stream: olE10NaTIVE 957860 bytes

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