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

Static analysis result for SHA-256 6e28e3164c20ecdf…

MALICIOUS

Office (OOXML) / .XLSX

601.1 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-10-12
MD5: 46bfbe02f7cb2b76d499eedb72c4abd6 SHA-1: 94b5c040984ea5fdd2cce2d40e3b20da925c5bfd SHA-256: 6e28e3164c20ecdf26ce722881ae7dec325c63cfa2effbb3484f62ecb1dd85d5
100 Risk Score

Malware Insights

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

The file is an OOXML document containing an embedded OLE object, specifically identified as a vulnerable Equation Editor component. High-severity heuristics indicate that this Equation Editor object carries a payload-like Ole10Native stream, suggesting it's designed to exploit a known vulnerability (likely CVE-2017-11882) to execute arbitrary code. The document body, formatted as an invoice, serves as a lure to trick the user into opening the malicious content.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/WHctePvBN.eeOYp0 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
d6c323633b31284fe598bfd85b93beb01b1b5b9076654c05f2f3cef2bd4ee81c		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/WHctePvBN.eeOYp0 801280 bytes
ooxml_oleobject_00_ole10native_00.bin
faa6b18a28b1a22fb935512060c448a7c4c36bab84a7fa38d966f037c41f43fe		 ole-package OOXML xl/embeddings/WHctePvBN.eeOYp0 Ole10Native stream: oLE10nAtIvE 792397 bytes

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