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

Static analysis result for SHA-256 e5844caca8dc7554…

MALICIOUS

Office (OOXML) / .XLSX

729.2 KB Created: 2020-07-07 21:52:29 UTC Authoring application: Microsoft Excel 16.0300
MD5: c9ecdc0b377364b17d68a11b1341f3ff SHA-1: 744af116d7a9d49302f77948f904f715da762dbd SHA-256: e5844caca8dc7554777439d57e3fc23f522216bf3280259f9c8274e1e6399a29
60 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model Hijacking

The primary indicator of maliciousness is the presence of an embedded OLE object, identified as an Equation Editor object. This is a common technique used to exploit vulnerabilities in Microsoft Office applications, often leading to the execution of arbitrary code. The specific CLSID offset suggests a potential exploit targeting the Equation Editor component.

Heuristics 2

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/7Ke5.As 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
e9d9b1475b5dd864fa3ba49bf1e809e074c152e99fa9afd531c409093e1995b8		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/7Ke5.As 884736 bytes
ooxml_oleobject_00_ole10native_00.bin
efd7c6a8dce852330e44d7405f642d3eef6cbfbf2f82e13fe69aaa41db0ac1ad		 ole-package OOXML xl/embeddings/7Ke5.As Ole10Native stream: Ole10Native 875166 bytes

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