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

Static analysis result for SHA-256 983ddd1518361a6f…

MALICIOUS

Office (OOXML) / .DOCX

136.3 KB Created: 2020-01-24 18:12:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: c3556d467facc436f486015df670fb77 SHA-1: 03e25e0759916fab6151703e29d05e8619181cba SHA-256: 983ddd1518361a6f16f1b4f4980f9f8e195ab46794ddb14935f83c5a93781f17
220 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The OOXML document contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening. The presence of ClamAV detections further confirms its malicious nature. The extracted artifacts 'macros.bas' and 'vbaProject_00.bin' are the VBA components responsible for the malicious behavior.

Heuristics 6

  • ClamAV: Doc.Malware.Generic-7561115-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Generic-7561115-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • 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/2018/wordml/cex
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2018/wordml
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
2d88aceaeda9e6a169e3771c3f4beaa4acd18099617d450507f3dc641e23ce47		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 13281 bytes
vbaProject_00.bin
8c1b782d411a7b4e4d760a5eeeffaf0b56ea41a2cdd45705833f1026fba12949		 vba-project OOXML VBA project: word/vbaProject.bin 112640 bytes
Detection
ClamAV: Doc.Malware.Generic-7561115-0
Obfuscation or payload: unlikely

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