Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 75458765fd7a2b6b…

MALICIOUS

Office (OLE) / .DOCX

163.3 KB Created: 2020-10-01 15:57:00 Authoring application: Microsoft Office Word
MD5: 4736bfb63098b392e2771798983fe1fc SHA-1: 15343a9b48cb857bd059a048a0405faa5e7a8b7d SHA-256: 75458765fd7a2b6b5166c942a08866ae96872adb0a9c8b000ba4229ed10d7b72
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is identified as malicious by ClamAV with the signature 'Doc.Malware.Emotet-9770197-0', strongly suggesting the Emotet family. High-severity heuristics indicate the presence of VBA macros, specifically a 'Document_Open' macro that utilizes 'CreateObject'. This pattern is typical for Emotet, where the macro executes obfuscated code to download and run a second-stage payload. The VBA code itself is heavily obfuscated, making a precise analysis of its actions difficult, but the heuristic firings and ClamAV signature are sufficient for attribution.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9770197-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9770197-0
  • 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
34626713db5720b3147c8823fb8dfd0fe34a12fce4df5a0aa65f24e3eab9d078		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10368 bytes

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