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

Static analysis result for SHA-256 7e60af333b52731e…

MALICIOUS

Office (OOXML) / .XLSX

11.1 KB Created: 2019-01-14 17:17:08 UTC Authoring application: Microsoft Excel 16.0300
MD5: 1266dd306644b85803a92e6256e038d9 SHA-1: 00663d6ec8ef55dd2d1a6bf4cfd3acc94dc4e8ae SHA-256: 7e60af333b52731e98a3c49c7e0ecca12d86c8277f4e6f8f118fd021beb5acbe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 Malicious Link

The file is an Excel spreadsheet containing an embedded OLE object, specifically identified as a Equation Editor object. Heuristics indicate this object is anomalous and exploits CVE-2018-0798. This suggests the document is designed to leverage this vulnerability for initial execution, likely leading to the download and execution of a second-stage payload. No document body text was available for analysis, and no scripts were extracted.

Heuristics 4

  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.openxmlformats.org/spreadsheetml/2006/main
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/spreadsheetml/2009/9/ac
    • http://schemas.microsoft.com/office/spreadsheetml/2014/revision
    • http://schemas.microsoft.com/office/spreadsheetml/2015/revision2
    • http://schemas.microsoft.com/office/spreadsheetml/2016/revision3

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
394e97879334d73d9228ae1f240dfad9459f218d6b1e6ddb22f196f6f9ccdb7b		 ooxml-ole-object OOXML embedded OLE part: xl/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
54761d7751791ef808c6935150b89c7b7272a9cd47911dd92dbb58156e66501e		 ole-package OOXML xl/embeddings/oleObject1.bin Ole10Native stream: oLe10nATive 1901 bytes

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