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

Static analysis result for SHA-256 8337a5a27864c1be…

MALICIOUS

Office (OOXML) / .DOC

56.0 KB Created: 2021-08-30 16:15:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: 9118d57f30428defac24f0d001cb9e43 SHA-1: b43850c86dea010d5da56c1e83ade0d0df04f502 SHA-256: 8337a5a27864c1be859eb9fb775790e2be36e146af757b63a831366498c7f15b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample contains an embedded OLE object identified as a Microsoft Equation Editor object. Heuristics indicate this object is anomalous and exploits CVE-2018-0798, a known vulnerability allowing for arbitrary code execution. This suggests the document is designed to exploit this vulnerability upon opening.

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.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
ooxml_oleobject_00.bin
78d8d88f4f45b78e067d828d6e2fc30c8d88bf763f435efdcabf08252fa5bec6		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 4096 bytes
ooxml_oleobject_00_ole10native_00.bin
0566d931b2d3d2c83709ab5a390cc9e3ac14b6109383a17f3a1962a0d404ecbb		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: olE10NatIve 1608 bytes

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