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

Static analysis result for SHA-256 a4c2ca9ee20f94c5…

MALICIOUS

Office (OOXML) / .XLSX

715.3 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-09-01
MD5: 0c9693ecfc93b68789c31f01731f644f SHA-1: b409faf19ad6e0518e56a08542f0ce2e09aaaee1 SHA-256: a4c2ca9ee20f94c50048e447224d5513f7efa9f1d5a1d800c61bc1df245869e3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking T1204.002 Malicious File

The file is an Office document containing an embedded OLE object, specifically identified as an Equation Editor object. High-severity heuristics indicate that this Equation Editor object carries a payload-like Ole10Native stream with an anomalous header, suggesting it's being used to exploit a vulnerability. The presence of this anomalous object strongly indicates the document is designed to deliver a malicious payload.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/s0PX5.WAW 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
d6c6e48e12a77a696fe5ebe6c3e3228ff4fa8b375cc82d357059ad30b13c202e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/s0PX5.WAW 982016 bytes
ooxml_oleobject_00_ole10native_00.bin
d6d6954a1932d1976b3d72ab6aad115c5f139ce38c4fc724782cad60e5a04a26		 ole-package OOXML xl/embeddings/s0PX5.WAW Ole10Native stream: olE10NAtiVe 972049 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.