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

Static analysis result for SHA-256 eeb7b78972ba0518…

MALICIOUS

Office (OOXML) / .XLSX

716.3 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-03-14
MD5: be20dda089bddbd1474067c2947f5dd6 SHA-1: 41afb91e1b057a1e2d7aa3524fd52ef050d4aba9 SHA-256: eeb7b78972ba051833135c6ba4215c0faf93d5dfe1c5603f74c777b38867646b
100 Risk Score

Malware Insights

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

The sample is an Office document 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 anomaly in the Ole10Native stream size and header further supports this, pointing towards a malicious intent to execute arbitrary code.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/jp.SvLa 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
8bc7c81674d8e4ae568aa00e9b82e1fdea42caa73dcf171ffd225af5f9577b1d		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/jp.SvLa 1042944 bytes
ooxml_oleobject_00_ole10native_00.bin
c36d7e422398d2b384892666d4f380664931121918fb9dd3184e887d4934807b		 ole-package OOXML xl/embeddings/jp.SvLa Ole10Native stream: OLE10Native 1032384 bytes

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