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

Static analysis result for SHA-256 341033562d0b516e…

MALICIOUS

Office (OOXML) / .XLSX

621.0 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-08-02
MD5: bd1034deed6e4e911d220770eed6fbe5 SHA-1: a85be7fb82f4249c0736f873c7cca4b9a9613a39 SHA-256: 341033562d0b516e03b824004e8f43a88bbb0a6a7b22a4b937cec3566c430a51
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an Excel file containing an embedded OLE object identified as an Equation Editor. This is a high-severity finding, indicating the potential for exploitation of vulnerabilities within the Equation Editor component to execute arbitrary code. The embedded object is likely a secondary payload or exploit. No document body or scripts were extracted to provide further context on the specific payload or delivery mechanism.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/I01uC.vyu 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
d7c7e7817db03434cdeb92deb9e3e70f640e33865cf116d951ba25a39ee18ef0		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/I01uC.vyu 939008 bytes
ooxml_oleobject_00_ole10native_00.bin
713ea063c6b261e1a2ef7109c9e0189daf8b1ac5b7e9a69fd9b4c7432771ccdb		 ole-package OOXML xl/embeddings/I01uC.vyu Ole10Native stream: Ole10NatiVE 928846 bytes

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