Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 14b98f981681ea78…

MALICIOUS

Office (OLE) / .DOCX

155.7 KB Created: 2020-12-30 18:32:00 Authoring application: Microsoft Office Word
MD5: e2aeeff4593a9dc0e95c940bb9b1181b SHA-1: 5088ff29d5730188af1596f8991115f7323a883f SHA-256: 14b98f981681ea78e6511ba3a68c28a85fee9696158358876cd49a9ac1110bb2
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro firing. This macro utilizes 'CreateObject' to interact with the file system, suggesting it attempts to write files or execute further code. The ClamAV detection name 'Doc.Downloader.EmotetRed02224-9938637-0' strongly suggests an Emotet family downloader. The script attempts to create files with specific names, such as 'K:\YHlgkkJwC\JPizHp.aKdIJcHp', which are likely stages of the malware's execution chain.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02224-9938637-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02224-9938637-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open 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 macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • 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.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
e8d3f7d8d02f0b30fe9a4f739a77064bdfd79f1fb249409f6cc7dd9e6c88bf62		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6622 bytes

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