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

Static analysis result for SHA-256 264559fb811a5c95…

MALICIOUS

Office (OOXML) / .XLSX

696.4 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-08-11
MD5: 96abcc18797fd8c25457ac800daee1fb SHA-1: ef6d9f0135454f1ee9c2f36d6b4b00b5f6767d78 SHA-256: 264559fb811a5c9570001d4c5b4c0c6dbc6e91b021be272f73d48ac1e4f407a1
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 in the Equation Editor component to execute arbitrary code. The presence of this object strongly suggests a malicious intent, likely to deliver a secondary payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/2Z.i5FNmD 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
1e88143ed78c0ba17d600549c8c7a568a8ab65af1f388abbe82c1a4725591a0f		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/2Z.i5FNmD 1035776 bytes
ooxml_oleobject_00_ole10native_00.bin
c79275803d1338b668c0b090fe41daec98502760216e572972637b4820c7e63e		 ole-package OOXML xl/embeddings/2Z.i5FNmD Ole10Native stream: OlE10NATivE 1025316 bytes

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