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

Static analysis result for SHA-256 549871fc0d7f9242…

MALICIOUS

Office (OOXML) / .XLSX

12.3 KB Created: 2006-09-16 00:00:00 UTC Authoring application: Microsoft Excel 14.0300
MD5: 69ba30b3e96ffd18530be69cf4557aef SHA-1: 9770e13083fc7d392821030b38ab1ef2b05f88f4 SHA-256: 549871fc0d7f924258ba1c25a6adbfd97f30dbdaa794a19e71dfbdb2f1852a9c
100 Risk Score

Malware Insights

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

The sample is an Office document containing an embedded OLE object, specifically identified as a vulnerable Equation Editor component. Heuristics indicate a high likelihood of exploitation for CVE-2018-0798. The embedded OLE object is likely used to execute arbitrary code, leading to a malicious payload delivery. No document body text was available for further context.

Heuristics 3

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object xl/embeddings/oleObject1.bin contains the Equation Editor CLSID, the legacy component exploited by CVE-2017-11882, CVE-2018-0802, and CVE-2018-0798.
  • CVE-2018-0798 — anomalous Equation Editor native stream high CVE likely CVE_2018_0798_EQUATION_NATIVE_ANOMALY
    Embedded Equation Editor OLE data contains anomalous native stream bytes consistent with a CVE-2018-0798-style Equation Editor exploit. This is treated as likely CVE evidence because the Equation object is malformed and payload-like, but it does not match the exact public matrix-overflow byte signature.
  • 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
08d7b76372f8bcece36de8dccb18a47aa2a88d645362527313cb0aa59bbb0ef1		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
74d5ee3e037f37d89c3e66e6d84b4d8c4536f9451091212e30750ed6839645bc		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: OLE10NaTive 1644 bytes

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