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

Static analysis result for SHA-256 cbb44c612280d92c…

MALICIOUS

Office (OOXML) / .XLSX

683.2 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 12.0000
MD5: 959704eb688d3782ff5b2ced88b2f1e7 SHA-1: 41c8ad45387240019010339668c71d96810a4bcb SHA-256: cbb44c612280d92cac1cd3445b21d572a3b50a1205b33437387eb0cb5f790ce2
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The sample is an OOXML file containing an embedded OLE object identified as an Equation Editor object. This is a known method for exploiting vulnerabilities to execute arbitrary code. The presence of this object strongly suggests a malicious intent to leverage this embedding for payload delivery.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/HygxszUD.jOPK 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
584f862e7329d362d933cfec7b79bd70f00cd1aca5ad88f421b227be73f4d15a		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/HygxszUD.jOPK 977920 bytes
ooxml_oleobject_00_ole10native_00.bin
400c50feee1e30a17a7c2938c34207d2dceda41f3845be2a9faf0d1e54908c73		 ole-package OOXML xl/embeddings/HygxszUD.jOPK Ole10Native stream: oLE10NAtive 967851 bytes

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