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

Static analysis result for SHA-256 ec1657ab5c63f553…

MALICIOUS

Office (OOXML) / .XLSX

723.2 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2022-06-03
MD5: c2ee26dcc45c8df0f29a773be0000e00 SHA-1: 7f44ab46172d58511d6fd78cbee4b4c7f1722ad8 SHA-256: ec1657ab5c63f5532ee55839085b9b2ebdb9861724aa49d6283b7bab0e3e17cc
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1559.001 Component Object Model Hijacking: Component Object Model Hijacking

The file contains an embedded OLE object, specifically identified as a Microsoft Equation Editor object. High-severity heuristics indicate that this Equation Editor object carries an anomalous Ole10Native stream, suggesting it is being used to deliver a malicious payload. The document body appears to be a purchase order, likely a lure to entice the user to open the malicious content. No scripts were extracted from this sample.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/VPMw.iAkqu contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • Equation Editor object carries payload-like Ole10Native stream high OLE_EQUATION_OLE10NATIVE_PAYLOAD_ANOMALY
    Embedded OLE object declares the Equation Editor CLSID but stores a large high-entropy Ole10Native stream with malformed package sizing. This is an exploit-shaped Equation/OLE payload container seen in malicious OOXML samples. It is not assigned to a specific CVE unless the MTEF/Equation Native primitive also matches.
  • 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
e777566d4502b32e11b4f07b51ff332714879b16fcea3f26651ae000445be421		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/VPMw.iAkqu 1029632 bytes
ooxml_oleobject_00_ole10native_00.bin
345e085c93f312d01ad3b043ef0532ac2359a27f554e92323bf7e1a8a4298db1		 ole-package OOXML xl/embeddings/VPMw.iAkqu Ole10Native stream: ole10NaTiVE 1019031 bytes

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