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

Static analysis result for SHA-256 70c4231ea038022a…

MALICIOUS

Office (OOXML) / .DOC

113.2 KB Created: 2020-06-30 08:10:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: ba1ca59788f4f86b8ad18adc8e183eea SHA-1: 759d88021da540c5884ce07d25e873a95dd8d990 SHA-256: 70c4231ea038022a2e9a90624092a392564b0a442d68ba3f8dc182c9bb369d85
222 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1204.002 Malicious File

The sample contains VBA macros, including an AutoOpen subroutine, which is a common technique for executing malicious code upon opening the document. The script uses URLDownloadToFile to download a payload from the URL http://tunawebtasarim.com/wp-content/themes/busify/_OH5S11easLpVM9ng.php?x=MDAwMSA_L6GAlxYiSJLpj4QxDgpBODX0U1t95LHwyokUzCoVNv0r8-mks30sFhgTRUvsC4RtbZ9L2OFczdpb5fmm4EhV3B2BtwO-xO20pNg4l7429q3Qtn8qLvms4oqqv-88wpz0wsEYewdTyH80OQAF to c:\programdata\1.dat. Subsequently, it uses regsvr32 to execute the downloaded file, indicating a downloader or dropper functionality.

Heuristics 6

  • URLDownloadToFile in VBA critical OLE_VBA_DOWNLOAD
    URLDownloadToFile in VBA
  • ClamAV: Doc.Downloader.GreenBox6-9139694-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.GreenBox6-9139694-0
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — 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://tunawebtasarim.com/wp-content/themes/busify/_OH5S11easLpVM9ng.php?x=MDAwMSA_L6GAlxYiSJLpj4QxDgpBODX0U1t95LHwyokUzCoVNv0r8-mks30sFhgTRUvsC4RtbZ9L2OFczdpb5fmm4EhV3B2BtwO-xO20pNg4l7429q3Qtn8qLvms4oqqv-88wpz0wsEYewdTyH80OQAF
    • 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
b22bcc96e0a079fcffc665bb8b70f8e32452f6fa359103a117fe92a342f14e0c		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2084 bytes
vbaProject_00.bin
57c5c268d378c831e5686cdf0a97c912108f4ec14ce387d61e44e5932f1357c8		 vba-project OOXML VBA project: word/vbaProject.bin 19456 bytes

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