Emotet — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 035c2f86f6544996…

MALICIOUS

Office (OOXML) / .DOC

88.0 KB Created: 2021-12-08 18:15:00 UTC Authoring application: Microsoft Office Word 16.0000
MD5: 1067eac1dccbd9bf47ed17e1ada03c21 SHA-1: 8bc6b07f41026931327aa5a207fef85b2d9887a0 SHA-256: 035c2f86f6544996a52f4fe3d4f40e0b226fc0ea839636dca320cd7b44c0ee6e
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros with an AutoOpen subroutine, which is a common technique for Emotet. The script uses CreateObject to execute a command that saves the document with a name derived from reversed keywords and then executes it using explorer.exe. This indicates the document is designed to download and execute a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetUpdate122100-9914334-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetUpdate122100-9914334-1
  • AutoOpen macro high OLE_VBA_AUTOOPEN
    AutoOpen macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • 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://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • 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/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
801a3628af7e2c86a56693d8c6f345bce3cff041526262a14049f95c7e0fbce9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 989 bytes
vbaProject_00.bin
63c496f24bd5a74662319714c6c21712fb44e574eec5d11dd068fd3c84b120a8		 vba-project OOXML VBA project: word/vbaProject.bin 14336 bytes

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