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

Static analysis result for SHA-256 7b2244ac900d1c61…

MALICIOUS

Office (OOXML) / .XLSX

591.1 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-08-24
MD5: 2ace1b311b891d0c3a01321168374e6b SHA-1: dec340d81bd316d96cee323d8ae2e2e393ca9e52 SHA-256: 7b2244ac900d1c6107925c7ed555c54e0171bee9ba11b233e5ec0f70611dd110
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 common technique used to exploit vulnerabilities and deliver malicious content. The embedded object's filename and its nature as an OLE object are the primary indicators.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/Nh.laoOb4 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
3e0b8ef8e368d523f2b6e5cb14ccab04afd1b80270498e062c1771d2981b2596		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/Nh.laoOb4 870400 bytes
ooxml_oleobject_00_ole10native_00.bin
e46a3d73c09b6bbe3c5260488b94ad7b39e2a08ded887d5b2a11b950fb01ad68		 ole-package OOXML xl/embeddings/Nh.laoOb4 Ole10Native stream: oLE10nATiVe 860681 bytes

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