Emotet — Office (OLE) malware analysis

Static analysis result for SHA-256 180477b92b3bf7d6…

MALICIOUS

Office (OLE)

230.5 KB Created: 2020-08-14 23:47:00 Authoring application: Microsoft Office Word
MD5: b15d7802ee258b87b9759838f72d18e0 SHA-1: bcc386a8797dcf1d3371d56acfc881e57a9cd1a2 SHA-256: 180477b92b3bf7d69b02af387ab42a2ecf08c6acddb52cb5a2de7c8f39ec7f58
262 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains VBA macros, including a Document_Open macro and a hidden UserForm command stager, which are indicative of Emotet malware. The ClamAV detection name 'Doc.Downloader.Emotet-9349720-0' further supports this family attribution. The macro's obfuscated nature and use of CreateObject suggest it is designed to download and execute a secondary payload.

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-9349720-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet-9349720-0
  • 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
c9e222625209724b824cd241f8d136260a3fd5171cd978940b3d275289318aae		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8071 bytes

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