Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 669d1ccf217208a8…

MALICIOUS

Office (OLE)

142.9 KB Created: 2020-10-15 06:34:00 Authoring application: Microsoft Office Word
MD5: 73859df3e007ff7bca73067e4d72f809 SHA-1: c2e05b8d1be3fc6eb1129ec166c0764731b28935 SHA-256: 669d1ccf217208a8c6fcf5b664d32d338c5941f6b2887fe21bfaa1088a3e68cb
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV as 'Doc.Downloader.Emotet-9778165-0'. High-severity heuristics indicate the presence of a Document_Open VBA macro that uses CreateObject to execute code. This macro is designed to download and execute a second-stage payload, a common Emotet tactic. The VBA macro 'macros.bas' is the source of this malicious behavior.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet-9778165-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9778165-0
  • 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
aa3822bbb419da819c0009ca2a50458591c2a917d376ecb16e3e87f227973bcb		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 10774 bytes

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