Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 5a71e3b3b00aaf8e…

MALICIOUS

Office (OLE) / .DOCX

155.5 KB Created: 2020-09-15 17:12:00 Authoring application: Microsoft Office Word
MD5: 698e2bc175c0640f7d28c112d3182d02 SHA-1: 24f08fdef8543403e47e11a6846fa4b20f996e13 SHA-256: 5a71e3b3b00aaf8eec2c099e531ba448d182e9b70b55059d660bb40ef429e447
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros that execute a Document_Open auto-execution macro. This macro utilizes CreateObject to initiate a PowerShell command. The reconstructed PowerShell command appears to be designed to download and execute a second-stage payload from a remote source, indicated by the obfuscated string that decodes to a command involving 'powershell -EncodedCommand'. The ClamAV detection name 'Doc.Malware.Emotet-9762377-0' strongly suggests the Emotet family.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9762377-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9762377-0
  • 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
2935858df1d0c162d4ca045aee67cb5dd51728380f384e9ebdf2e9a82ed900e7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22872 bytes

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