Emotet — Office (OLE) / .DOCX malware analysis

Static analysis result for SHA-256 748837bdf7893d4f…

MALICIOUS

Office (OLE) / .DOCX

149.8 KB Created: 2020-09-28 14:26:00 Authoring application: Microsoft Office Word
MD5: 897ee7f9eeb110c499e494966897973b SHA-1: e84282572dbdb867f5fad6ef15d9fc459e1f8a32 SHA-256: 748837bdf7893d4f7240ca6396f25eb971a9829651cb24d330996ed4c2c051de
202 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample was detected as Emotet by ClamAV and contains a VBA macro with a Document_Open auto-execution routine. The macro utilizes CreateObject and appears to be heavily obfuscated, with a truncated string 'y2 , 4hj' being a prominent part of its execution. This suggests the macro's primary purpose is to download and execute a secondary payload, a common Emotet behavior.

Heuristics 6

  • ClamAV: Doc.Malware.Emotet-9768663-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Malware.Emotet-9768663-0
  • 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
52573b116f951816e527b23fd5cfdfc578caca117ddeb459f950d0953f709442		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6643 bytes

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