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

Static analysis result for SHA-256 713b8ee4d69ab5f7…

MALICIOUS

Office (OOXML) / .DOC

114.0 KB Created: 2020-06-30 08:14:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: c5d4a224fea40f3e199259d9f291420c SHA-1: d78b326396d126dddda7defc46e033801cf27b6e SHA-256: 713b8ee4d69ab5f7db4b5e24fd395d6bbbc0a0f8f8e7b2968b044d231972aab7
222 Risk Score

Malware Insights

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

The sample contains a VBA macro with an AutoOpen subroutine that executes a command. This macro uses the URLDownloadToFile function to download a file from 'https://sx-facemask.com/wp-content/themes/busify/_Eb-6XZQPkeWFE2F0.php?x=MDAwMSCXfM02CmgQnk-DMmwZ6iqPCFHtzoeaRLfZrzLpiPzvIOSihDhzp9ISW4bpG92mmNuiHQNMEkLVrUmEz6koYzX70xVMGf6jVCqQeRVe7t85UJ6Q_r7oGwyZGzHnKZK1O-jzvCDYaZSg3VuYDRvD' to 'c:\programdata\1.dat'. Subsequently, it uses 'regsvr32 c:\programdata\1.dat' to execute the downloaded file, indicating a downloader pattern.

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 https://sx-facemask.com/wp-content/themes/busify/_Eb-6XZQPkeWFE2F0.php?x=MDAwMSCXfM02CmgQnk-DMmwZ6iqPCFHtzoeaRLfZrzLpiPzvIOSihDhzp9ISW4bpG92mmNuiHQNMEkLVrUmEz6koYzX70xVMGf6jVCqQeRVe7t85UJ6Q_r7oGwyZGzHnKZK1O-jzvCDYaZSg3VuYDRvD
    • http://ocsp.digicert.com0
    • 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
dd4d671afe285ed6fcaa586c05177db8c072c786837cce848d132b0e0625a326		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 2373 bytes
vbaProject_00.bin
930a68babf2d898633c43b998aabd680afe54ab77f1224e025ad4177f9865fed		 vba-project OOXML VBA project: word/vbaProject.bin 19968 bytes

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