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

Static analysis result for SHA-256 31bbb19f258ea077…

MALICIOUS

Office (OOXML) / .XLSX

670.0 KB Created: 2010-06-04 08:55:28 UTC Authoring application: Microsoft Excel 15.0300 First seen: 2023-09-19
MD5: 195abd998b9d3e03081ed44ad0c0b081 SHA-1: b2e982de707d5b1a900d32a9e7c223a37b3e077d SHA-256: 31bbb19f258ea077876396901ffb676a8cc141f82a2c431575e1fe01710c8c4e
60 Risk Score

Malware Insights

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

The sample is an Office document containing an embedded OLE object, identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities in the Equation Editor component, often leading to the execution of a malicious payload. The document body contains what appears to be a fabricated invoice, likely intended to trick the user into interacting with the embedded object.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/0RB1mP.8bipH 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
fa06db12e9b4df989814ab846895583a2cfa466332e1c3752d8338a1cdf7b835		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/0RB1mP.8bipH 910336 bytes
ooxml_oleobject_00_ole10native_00.bin
a81c0f1d8969c1a1ae8f532c836ddecdd5ba8e2d813a73faedb20e3ab1b1449d		 ole-package OOXML xl/embeddings/0RB1mP.8bipH Ole10Native stream: Ole10NAtIve 901051 bytes

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