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

Static analysis result for SHA-256 170da670ff6787cb…

MALICIOUS

Office (OOXML) / .DOC

53.0 KB Created: 2017-10-27 22:23:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 54f8ac92afeb71cf53fe5c10a71fb880 SHA-1: e8e23e2a2a00a9a041bfeb851fc11b7cab429b45 SHA-256: 170da670ff6787cb5a2829022e5a4a8acc9ab59bd31b3378e4bcdfc72b89712a
110 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample contains a DDE field that is chained with SET/REF variables, indicating an attempt to execute commands. The critical heuristic decodes the payload to 'C:\Programs\Microsoft\Office\MSWord.exe\..\..\..\..\Windows\System32\cmd.exe', which is a command to launch cmd.exe. This technique is commonly used to download and execute further malicious payloads.

Heuristics 4

  • Field QUOTE with ASCII-integer command payload critical OOXML_FIELD_QUOTE_ASCII_PAYLOAD
    QUOTE field in word/document.xml carries a decimal-ASCII byte sequence that decodes to a shell command referencing cmd
  • Word field-chain (SET/REF) co-located with DDE high OOXML_FIELD_SET_REF_CHAINING
    3 SET/REF variable pair(s) co-occur with DDE field(s) in word/document.xml
  • DDE field low OOXML_DDE
    DDE (Dynamic Data Exchange) field found in word/document.xml. The command does not reference a known-dangerous executable, but DDE can be abused for code execution.
  • 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.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • 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/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • 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
    • http://schemas.openxmlformats.org/package/2006/content-types
    • http://schemas.openxmlformats.org/package/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-properties
    • http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-properties
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocument
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettings
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/settings
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/theme
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTable
    • http://schemas.openxmlformats.org/drawingml/2006/main
    • http://schemas.microsoft.com/office/thememl/2012/main
    • http://schemas.openxmlformats.org/schemaLibrary/2006/main
    • http://schemas.microsoft.com/office/word
    • http://schemas.openxmlformats.org/officeDocument/2006/extended-properties
    • http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes
    • http://schemas.openxmlformats.org/package/2006/metadata/core-properties
    • http://purl.org/dc/elements/1.1/
    • http://purl.org/dc/terms/
    • http://purl.org/dc/dcmitype/
    • http://www.w3.org/2001/XMLSchema-instance

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