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

Static analysis result for SHA-256 ebe0db47f3d58129…

MALICIOUS

Office (OOXML) / .XLSX

743.9 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2024-06-08
MD5: 0bae405b6cbbd6f2a51b6c8f3d3229d4 SHA-1: c883182707d44204007d65a270f4f5794dd9328b SHA-256: ebe0db47f3d58129ded5690057c586c10adba99f5efea70eb2defd4be879d204
100 Risk Score

Malware Insights

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

The file contains an embedded OLE object, specifically identified as a Equation Editor object with an anomalous Ole10Native stream. This indicates the object is likely carrying a malicious payload. The document body, formatted as an invoice, is a lure to trick the user into opening the malicious embedded object. The presence of an anomalous Ole10Native stream within the Equation Editor object strongly suggests exploitation of a known vulnerability to execute arbitrary code.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/BydFWa69.QIiJ7I 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
281431d94a86288fd9335563ba5ec765a37835ac57c278ab3450aee604d4c668		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/BydFWa69.QIiJ7I 1072128 bytes
ooxml_oleobject_00_ole10native_00.bin
f155fa49e69bc8aebf9b6229ae455185d405d3639e9f672fbefa5584cf69dca7		 ole-package OOXML xl/embeddings/BydFWa69.QIiJ7I Ole10Native stream: oLe10naTIvE 1061207 bytes

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