Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 fab55894a614afbe…

MALICIOUS

Office (OOXML)

49.8 KB Created: 2017-10-27 22:23:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2018-01-23
MD5: 793395ba8fea857d5e6079051ed2b8ec SHA-1: 1f035249c6f970867216dddc914de0952703f59a SHA-256: fab55894a614afbe7a3fefd84f9520087ae332406863bc5ca04a038a3402ac87
202 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains a critical heuristic firing for a malicious DDE command, which leverages cmd.exe to execute a PowerShell command. This PowerShell command is designed to download a file named 'putty.exe' from a specific URL to 'c:\Windows\Temp\log.exe' and then execute it. This indicates the document is a malicious attachment intended to download and run a second-stage payload.

Heuristics 5

  • ClamAV: Doc.Exploit.DDEautoexec-6346603-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Exploit.DDEautoexec-6346603-1
  • Malicious DDE command critical OOXML_DDE_MALICIOUS
    DDE field in word/document.xml launches a dangerous executable: \\Microsoft\\Office\\Word\\..\\..\\..\\..\\windows\\system32
  • Reference to PowerShell high SC_STR_POWERSHELL
    Reference to PowerShell
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2014/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartexIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/markup-compatibility/2006In document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2016/inkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/drawing/2017/model3dIn 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.microsoft.com/office/word/2010/wordprocessingDrawingIn 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/2010/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2012/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2016/wordml/cidIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2015/wordml/symexIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroupIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInkIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2006/wordmlIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShapeIn document text (OOXML body / shared strings)
    • https://the.earth.li/~sgtatham/putty/latest/w32/putty.exeIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/content-typesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationshipsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/extended-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/relationships/metadata/core-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/officeDocumentIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/webSettingsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/settingsIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/stylesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/themeIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships/fontTableIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/thememl/2012/mainIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/schemaLibrary/2006/mainIn document text (OOXML body / shared strings)
    • http://schemas.microsoft.com/office/wordIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/extended-propertiesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypesIn document text (OOXML body / shared strings)
    • http://schemas.openxmlformats.org/package/2006/metadata/core-propertiesIn document text (OOXML body / shared strings)
    • http://purl.org/dc/elements/1.1/In document text (OOXML body / shared strings)
    • http://purl.org/dc/terms/In document text (OOXML body / shared strings)
    • http://purl.org/dc/dcmitype/In document text (OOXML body / shared strings)
    • http://www.w3.org/2001/XMLSchema-instanceIn document text (OOXML body / shared strings)

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