Emotet — Office (OLE) / .DOC malware analysis

Static analysis result for SHA-256 15156c43fc650790…

MALICIOUS

Office (OLE) / .DOC

211.1 KB Created: 2020-02-06 22:10:00 Authoring application: Microsoft Office Word
MD5: 2785377182c5263ea31d540b9b9d6a6c SHA-1: 2aa76ea9dd997af7bdeb6c71d9c8260b75053cbe SHA-256: 15156c43fc6507906a0189d01fa8d975d0f2c7f53a2570392d58d6b7028cd832
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is a malicious Office document containing VBA macros, specifically triggering a Document_Open macro. Heuristics indicate a hidden command stager utilizing CreateObject and string manipulation, consistent with Emotet's behavior. The ClamAV detection explicitly names 'Doc.Downloader.Emotet-7578627-0', confirming the family and its downloader functionality.

Heuristics 7

  • VBA UserForm hidden-property command stager critical OLE_VBA_USERFORM_HIDDEN_COMMAND_STAGER
    VBA auto-exec macro creates a COM object from a decoded variable and reconstructs command text through Split/Join and hidden UserForm properties such as ControlTipText, Tag, Pages, or HelpContextId. This is a high-confidence macro downloader/loader shape seen in the reviewed OLE set, but it is not an Office CVE exploit primitive.
  • ClamAV: Doc.Downloader.Emotet-7578627-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-7578627-0
  • 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
f4992f2a12d16edbd77ff218bdba59e660494c4377854ee978a384724889f5a5		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12919 bytes

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