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

Static analysis result for SHA-256 4c7bcfa265a8332c…

MALICIOUS

Office (OOXML) / .XLSX

606.3 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 2a2d61d313890fcd80d8fedbf75d6abc SHA-1: f760542efe72f5d3fdf630d883f3af775b2f6965 SHA-256: 4c7bcfa265a8332ca7dd445fcd0434e050c9c70419ae3fb365f82818b90c212a
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. This is a known vector for exploiting vulnerabilities like CVE-2017-11882, which allows for arbitrary code execution. The embedded object's filename is noted as 'jf17IV6O.vE'. The primary attack pattern is likely spearphishing, leveraging the Equation Editor vulnerability to deliver a malicious payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/jf17IV6O.vE 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
13d61bd7cd5832c207e840d7dcd8372e65526ff9a00ee4aaf309ee4334b6f742		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/jf17IV6O.vE 864256 bytes
ooxml_oleobject_00_ole10native_00.bin
6ced6519071164cd0b9c2eac27515f9eb60b6d292e394422254039e3a98e5054		 ole-package OOXML xl/embeddings/jf17IV6O.vE Ole10Native stream: OLE10NatIvE 854794 bytes

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