Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 0bba700eccd74056…

MALICIOUS

Office (OLE)

133.2 KB Created: 2020-10-14 19:03:00 Authoring application: Microsoft Office Word
MD5: 89d7f3d1369d5d6769a42ab46a8b4132 SHA-1: dfa3d7a8c00ee46ebb87dbe290a746f9cfcc7e68 SHA-256: 0bba700eccd740560f4344921b97e592f9fc4e31fea87d50bd0dadcaf73ddf75
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1137.001 Office Application Startup: Office Application T1204.002 Malicious File: Malicious File

The sample is identified as malicious by ClamAV with the signature Doc.Downloader.Emotet-9778091-0. Static analysis revealed the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject, indicating an attempt to execute arbitrary code. The VBA script is heavily obfuscated but its structure and the presence of CreateObject strongly suggest it's designed to download and execute a secondary payload, a common Emotet behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778091-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778091-0
  • 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
35ba581a7d07c242723817cd679240b29046cc2a7f4485862374591738596dda		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 9454 bytes

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