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

Static analysis result for SHA-256 bf04af05000e8205…

MALICIOUS

Office (OOXML) / .XLSX

678.1 KB Created: 2022-08-10 18:51:50 UTC Authoring application: Microsoft Excel 16.0300
MD5: c2a1f2f11eafc8f0faa2480b44d95d7d SHA-1: 4aacb955102f10f5c66089fd097f22a633360383 SHA-256: bf04af05000e8205dad105999af809b1031eeb438aff45e36ae9ab416d669002
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The file is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. This strongly suggests an attempt to exploit a known vulnerability within the Equation Editor to execute arbitrary code. The document body contains what appears to be financial or order information, which could serve as a lure. No scripts were extracted, and no direct IOCs like URLs or hashes were found in the provided evidence.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/3I.dGq5 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
b2ebf0570739d4b29bc9c2af581bf83113d1f2d9050d4230916d1634d6433ec6		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/3I.dGq5 992768 bytes
ooxml_oleobject_00_ole10native_00.bin
9f73d88c459bdd72211a7933f19056f50b3b9d900111a3746c16375889f21326		 ole-package OOXML xl/embeddings/3I.dGq5 Ole10Native stream: Ole10NaTIvE 982054 bytes

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