Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 66aa75aca1e5a0fa…

MALICIOUS

Office (OLE) / .DOCX

171.8 KB Created: 2020-09-22 18:42:00 Authoring application: Microsoft Office Word
MD5: 09fa99a3a44a6a20ef98515935646db1 SHA-1: da35f85a9bda0291268e4aa0652f95c3dba8f72f SHA-256: 66aa75aca1e5a0fae3797f424ff58868d5a813eeef2d2c287a893e91b60769f8
242 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample was detected as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9765458-0', indicating a known downloader. High-severity heuristics confirm the presence of VBA macros, specifically a 'Document_Open' macro that utilizes 'CreateObject' and 'GetObject' calls. This strongly suggests the macro is designed to download and execute a secondary payload, a common Emotet tactic. No specific URLs or hostnames were extracted, but the ClamAV signature is a high-confidence IOC.

Heuristics 7

  • ClamAV: Doc.Downloader.Emotet-9765458-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9765458-0
  • 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
4c1d45ab400998e9849e03fb488749a88ec1375f45fc179ad034e6ee3d25ecfd		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 21065 bytes

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