Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 77d554362fa07b15…

MALICIOUS

Office (OLE) / .DOCX

157.2 KB Created: 2020-12-30 07:47:00 Authoring application: Microsoft Office Word
MD5: 32d97cb5d0205e2c9cc23ea6e1f36f69 SHA-1: 48fc16e8ec3366fe211de8a4e9a433b51a3d3881 SHA-256: 77d554362fa07b15b16c8116ad6889b7c0e28b2cc52a0c31c5a1bf86738cbb9f
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample contains a VBA macro that is automatically executed upon opening the document, as indicated by the 'Document_Open' macro and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristic. The macro uses 'CreateObject' to instantiate a 'Scripting.FileSystemObject' and attempts to create several files with obfuscated paths, suggesting it is preparing to download and execute a secondary payload. The ClamAV detection name 'Doc.Downloader.EmotetRed02224-9938637-0' strongly suggests the Emotet family.

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
9bf607663b8a2bf6d5409ee86f6e92f88c816fbcbd12854fba6197389a76ce81		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6567 bytes

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