Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 66f30f7d40ef0e23…

MALICIOUS

Office (OLE) / .DOCX

185.4 KB Created: 2020-10-30 04:19:00 Authoring application: Microsoft Office Word
MD5: 6ca559eb0d4370f3373fae59f4509611 SHA-1: 1b25be3c7a12ebdf8ada189346e7f9508833b0ca SHA-256: 66f30f7d40ef0e230f042cd6abe51971e49af52617515c3d0d99f3f365a59e90
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 is identified as malicious by ClamAV with the signature 'Doc.Malware.Emotet-9785300-0', strongly suggesting the Emotet family. The presence of a Document_Open macro and CreateObject calls indicates that the VBA code is designed to execute automatically upon opening the document. The obfuscated nature of the VBA script, evident from the extensive concatenation and use of mathematical functions, points towards a deobfuscation routine likely intended to download and execute a further stage payload.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9785300-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9785300-0
  • 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
f7e154fbc1687723523f4f201e3a1591c84897657fe14056a01af3060d347cbe		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 17509 bytes

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