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

Static analysis result for SHA-256 fbd1b454da7fecb9…

MALICIOUS

Office (OOXML) / .DOC

94.1 KB Created: 2021-04-28 13:50:00 UTC Authoring application: Microsoft Office Word 15.0000
MD5: 8832e0557e1b144bad206ed6d14d5c34 SHA-1: 4b729d3262362a2ab3edab09ac1f625af8f5e0c1 SHA-256: fbd1b454da7fecb92c40b9b2f74fc8fecae79340afdc011e7c0d6339fabdcfde
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1566 Phishing T1566.001 Phishing: Spearphishing Attachment

The sample contains an embedded OLE object specifically identified as an Equation Editor object, which is associated with CVE-2018-0798. This indicates the document is designed to exploit this vulnerability to achieve arbitrary code execution. No specific malware family was identified, but the exploit mechanism is clear.

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
59c9bfc9d540360c233708287b0c5414c5ad58812614b8801fe63153db7b84d0		 ooxml-ole-object OOXML embedded OLE part: word/embeddings/oleObject1.bin 3584 bytes
ooxml_oleobject_00_ole10native_00.bin
7545a853ffc2625a11d4c8ad17e054b5cf0c671b5102a747f3339faec1377970		 ole-package OOXML word/embeddings/oleObject1.bin Ole10Native stream: oLE10naTiVE 1420 bytes

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