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

Static analysis result for SHA-256 9bd11fe90ac658c0…

MALICIOUS

Office (OOXML) / .XLSX

2.60 MB Created: 2025-09-04 00:14:20 UTC Authoring application: Microsoft Excel 12.0000
MD5: 2e36b858572c570fb32c72f28f04f07d SHA-1: d780041a089baec29cb99f1ccd13bcc90d7417a9 SHA-256: 9bd11fe90ac658c0a700ac9a407812b54c921a995c0f3294f408ff56c78494ef
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The file is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. The heuristic 'SE_ENABLE_LURE' indicates that the document likely contains instructions to enable macros or editing, a common tactic to bypass security measures. This suggests the document's primary purpose is to act as a dropper or downloader for further malicious activity.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/Y2X8K97s.p4 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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
5d55b92bb678181d6050961e9317b9dc64814308d6678739b4e21fa449fef71a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/Y2X8K97s.p4 3022848 bytes

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