Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 149107eec47eec15…

MALICIOUS

Office (OLE)

132.9 KB Created: 2020-10-14 19:03:00 Authoring application: Microsoft Office Word
MD5: 798957bf292471875f63fe7079f63699 SHA-1: 9105f0011eb6146c30a2951a45aa5dce7a5ff241 SHA-256: 149107eec47eec15d6160353b5102a17c8b552474e89828511de257fd78d3a52
202 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample is identified as malicious by ClamAV with the signature 'Doc.Downloader.Emotet-9778091-0', indicating a downloader for the Emotet family. High-severity heuristics confirm the presence of VBA macros, specifically a Document_Open macro that utilizes CreateObject for execution. The VBA script, though obfuscated, contains calls to CreateObject, which is a common technique for executing arbitrary code or downloading additional payloads. The presence of the 'Document_Open' macro and the 'CreateObject' call strongly suggests the intent to download and execute a second-stage payload.

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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