Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 091ad0da416360ac…

MALICIOUS

Office (OOXML)

37.5 KB Created: 2018-07-12 08:40:00 UTC Authoring application: Microsoft Office Word 12.0000 First seen: 2019-01-11
MD5: d4197fb2d88054e6f25d351cb3f5f76a SHA-1: 148f26cdfe0ce7df36c8e6808b537344922c9ba3 SHA-256: 091ad0da416360ac9505f295d5e4a21fbb4caacfa6d92a34c05eb40876a47572
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded OLE object, specifically identified as an Equation Editor object. Heuristics indicate this object is anomalous and vulnerable to CVE-2018-0798, suggesting it's designed to exploit this vulnerability for client-side code execution. No document body text or scripts were extracted, limiting further analysis of the payload.

Heuristics 4

  • Equation Editor OLE object high CVE related OLE_EQUATION_EDITOR
    Embedded OLE object word/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/markup-compatibility/2006 In document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/mathIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawingIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/wordprocessingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 4096 bytes
SHA-256: 7e5b1994777442f162fc31070996f8cf3b866b414e5e179f626cb9e151244e1d
ooxml_oleobject_00_ole10native_00.bin ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: Ole10Native 2015 bytes
SHA-256: edece37f61e2802e95b3d69fc0e60ebeff2f7ab5d6bd08fb5feebfe7270b9a1d

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