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

Static analysis result for SHA-256 bf4d02eb5d6de1d9…

MALICIOUS

Office (OOXML) / .XLSX

710.7 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: 76807fe207af7412f6047c5378b7ce5c SHA-1: e62e99a09bb79ba9b25ab72c7757225112722366 SHA-256: bf4d02eb5d6de1d94e36b537b3041e781b25fbebcb3ce7e20937e57548c5a59e
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The file is an OOXML document containing an embedded OLE object, specifically identified as an Equation Editor object. This is a high-severity finding and a common technique for exploiting vulnerabilities such as CVE-2017-11882, which allows for arbitrary code execution when the embedded object is opened. The presence of this object strongly suggests an attempt to deliver a malicious payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/mK3ucOH9O.6mUr 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
7045a0787c84955b49f62325fdad26f5ebfc88c2d18c45237ed429498b3f1cc5		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/mK3ucOH9O.6mUr 991232 bytes
ooxml_oleobject_00_ole10native_00.bin
698133eb08a8181d7f99fa9708fbc5e88a4aab63907087dded6e52186a61f28e		 ole-package OOXML xl/embeddings/mK3ucOH9O.6mUr Ole10Native stream: olE10NATive 980761 bytes

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