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

Static analysis result for SHA-256 8a370492d7bc5b8f…

MALICIOUS

Office (OOXML) / .XLSX

602.6 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: d3484ec3204a4ce82a8f9c2d1af5e3a8 SHA-1: 431ae4f9303286fb5c44d31991bdddd596e8b485 SHA-256: 8a370492d7bc5b8fed21221a51929b5bb222d38f3dc7dbafcb4dffa6fb61cc6a
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious File

The sample is an OOXML XLSX file containing an embedded OLE object identified as an Equation Editor. This is a common technique used to deliver exploits, such as CVE-2017-11882, which can lead to arbitrary code execution. The presence of this object strongly suggests an attempt to exploit a vulnerability within the Equation Editor component.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/CV6O6VGm.Mfo 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
abf1c722124215a1728f40e2de4e4efdca97591e95085d7c20d5f8844a29436d		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/CV6O6VGm.Mfo 853504 bytes
ooxml_oleobject_00_ole10native_00.bin
631c886d9ecf877141ad97b3aa98cc0d7080f487c7230734d0b91fb73daf10eb		 ole-package OOXML xl/embeddings/CV6O6VGm.Mfo Ole10Native stream: Ole10naTivE 844194 bytes

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