Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 0f885730f623d6c4…

MALICIOUS

Office (OLE) / .DOCX

148.1 KB Created: 2020-09-28 14:26:00 Authoring application: Microsoft Office Word
MD5: 076cb0ed9e1f04ac071982df4c87063d SHA-1: b4480b53074bc813555092e4a2a865c2199d129d SHA-256: 0f885730f623d6c4138e7d2bb857e04ba8a3478341255ad547fce8d90fa04046
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Document_Open auto-execution macro, which is a common technique for Emotet. The script attempts to obfuscate its actions by using mathematical functions and string concatenation, but the presence of CreateObject and the structure strongly suggest it's designed to download and execute a second-stage payload. The ClamAV detection also explicitly names Emotet.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9768663-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9768663-0
  • 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
52573b116f951816e527b23fd5cfdfc578caca117ddeb459f950d0953f709442		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6643 bytes

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