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

Static analysis result for SHA-256 03ccbda7d7f365fb…

MALICIOUS

Office (OOXML) / .XLSX

648.3 KB Created: 2023-07-26 19:45:53 UTC Authoring application: Microsoft Excel 12.0000 First seen: 2023-08-07
MD5: c48c4aa77996b661fdccafb82500126a SHA-1: f280ab915b4d1d83ba2dd70d849cb3d257ea52cd SHA-256: 03ccbda7d7f365fbe412f8fa009ddb0bea8a3af39b55808f6ec32e277466ed75
100 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 object has an anomalous Ole10Native stream, indicating it likely carries a malicious payload. The presence of this object is a strong indicator of an exploit attempt, likely leveraging vulnerabilities within the Equation Editor component.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/o6r.L4 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
281d70f43a0e1d23b84a3b21aab7fdc2684ea807f58fa0a0b25e55d88b9a452e		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/o6r.L4 895488 bytes
ooxml_oleobject_00_ole10native_00.bin
c8ee312df47a8ee77aac354a2c3af40ec9b7d802a7a7edd0db0b51dddb302359		 ole-package OOXML xl/embeddings/o6r.L4 Ole10Native stream: oLe10natiVe 886190 bytes

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