Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 1204f616672d2373…

MALICIOUS

Office (OLE) / .DOCX

161.6 KB Created: 2020-09-15 22:30:00 Authoring application: Microsoft Office Word
MD5: e90eba0ab370ea7601885964a499ff75 SHA-1: c68407a5eabea4cc569ada06eeb042f6f8287fa6 SHA-256: 1204f616672d2373a438ccae281ece4d62c866ae242e84de711944796b52fae7
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

The sample contains a Document_Open VBA macro that is obfuscated and uses CreateObject to execute a PowerShell stager. ClamAV detection confirms this is Emotet, a known downloader family. The macro's primary function appears to be downloading and executing a second-stage payload.

Heuristics 7

  • Hidden UserForm PowerShell EncodedCommand stager critical OLE_USERFORM_OBFUSCATED_POWERSHELL
    OLE document contains a UTF-16LE form/property string with an obfuscated PowerShell -EncodedCommand payload. The observed macro family reconstructs this hidden string with Split/Join or UserForm property reads and launches it through WMI/COM process creation. This is downloader malware, not an Office CVE exploit.
  • ClamAV: Doc.Downloader.Emotet-9762299-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9762299-0
  • 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
552d784ab69156220ac353b18611d326284a0fac1bed1acb2f14ae222ef14256		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25576 bytes

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