Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 77308b34c7f16751…

MALICIOUS

Office (OLE) / .DOCX

179.0 KB Created: 2020-10-26 17:32:00 Authoring application: Microsoft Office Word
MD5: cfda65b39a1ae1385a60df3aab59d0fc SHA-1: 0b5dd7c6da575cb22ab72e0ad7a6245240a26d4e SHA-256: 77308b34c7f167510dcdfc5e0de665824b0826603235b32f2c644ddf354cf6fc
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 VBA code is heavily obfuscated but the presence of CreateObject and the ClamAV detection signature "Doc.Downloader.Emotet-9784039-0" strongly indicate its malicious intent. The macro likely downloads and executes a second-stage payload.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9784039-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9784039-0
  • 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
fd86ec2eb619814e7cd62b76d9f6553c2ce07800d98173938893210dd89c469b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 15663 bytes

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