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

Static analysis result for SHA-256 bcc31f38189c1392…

MALICIOUS

Office (OOXML) / .DOC

14.8 KB Created: 2022-02-09 02:58:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 4c5f4fb33e1448876d42b89bc2ebd7aa SHA-1: 3f7fbc7ab109a6000077ed0082c17999a9f226c2 SHA-256: bcc31f38189c1392ed50d084df79c8b27d019c90e8fa9c87dfcac668e30e1dd6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer

The sample is a malicious OOXML document containing VBA macros. The script uses the URLDownloadToFileA function to download a file named Powerpnt.exe from the URL http://10.10.14.101:80/download/Powerpnt.exe and saves it to the user's APPDATA directory. This indicates the document's purpose is to act as a downloader for a second-stage executable payload.

Heuristics 4

  • URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD
    URLDownloadToFile in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Environ() call (env variable access) low OLE_VBA_ENVIRON
    Environ() call (env variable access)
  • 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://10.10.14.101:80/download/Powerpnt.exe
    • http://10.10.14.101:80/download/Powerpnt.exe�
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
90e4a4420a439153da8b7ed84fc8f90fb65316c4d78363827beb1307ec3726f1		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 644 bytes
vbaProject_00.bin
fc42719b9f1ac9d32f4c7584810c572c00e017912963901b1176ad668f725275		 vba-project OOXML VBA project: word/vbaProject.bin 9216 bytes

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