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

Static analysis result for SHA-256 3b42145ff197762a…

MALICIOUS

Office (OOXML) / .XLSX

686.7 KB Created: 2023-08-03 11:34:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: cd4b6e491513b2e0e88a19c7ba588744 SHA-1: abdbd356a7daa493fcacaec8f17cde7f28e66a74 SHA-256: 3b42145ff197762aaa66bc2f5f4f00b8d4adfac572874c6bcf751060dd7d7624
60 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The file is an Excel spreadsheet containing an embedded OLE object, specifically identified as a Microsoft Equation Editor object. This is a known vector for exploiting vulnerabilities like CVE-2017-11882, which allows for arbitrary code execution. The embedded object is the primary indicator of malicious intent, suggesting the file is designed to deliver a secondary payload.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/g5GDl6d.noKlXAq 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
f560b182cbbddd9a63a5d781927d6915a0f3dac015fb49fb1a7b3db48a52cf33		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/g5GDl6d.noKlXAq 991744 bytes
ooxml_oleobject_00_ole10native_00.bin
d211b1e591bbbce9cdc374a7430d34112965337a00fd7697170aa6a5d90a96d5		 ole-package OOXML xl/embeddings/g5GDl6d.noKlXAq Ole10Native stream: ole10natiVE 981003 bytes

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