Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 748c41d1a000aea5…

MALICIOUS

Office (OLE) / .DOCX

195.7 KB Created: 2020-09-22 04:18:00 Authoring application: Microsoft Office Word
MD5: 47d7c9870169a6823da29c709166eef4 SHA-1: 1ea741a9ddd7c09083a6c176581b6ae12aa63eaa SHA-256: 748c41d1a000aea514c6a37f5c1e4f0c856109a038d5303337d2564bd75c21fb
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, specifically a Document_Open auto-execution macro, which is a strong indicator of malicious intent. The ClamAV detection and heuristic firings for CreateObject and GetObject further support this. The VBA script appears to be heavily obfuscated but is designed to download and execute a second-stage payload, a common Emotet tactic.

Heuristics 7

  • ClamAV: Doc.Malware.Emotet-9764756-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9764756-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • GetObject call high OLE_VBA_GETOBJ
    GetObject 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
3b0af88f4dd9c23a17bbdbbca50e89a637a2364695c54b84b34b6c26baade961		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 19032 bytes

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