Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 ae917357f52e350e…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 6ebf4f68e5a9c43ae0f5b2d079d06df5 SHA-1: 452437e4be02e2c0e984b1e8123860777814cd9f SHA-256: ae917357f52e350e47962a288309a8d56fb5e129543a6ae0af4142493f98018f
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic

The file contains a Workbook_Open VBA macro that utilizes Wscript.Shell to execute commands. The macro attempts to download and run malicious VBS and BAT files from the reconstructed URL: "http://santetortillla.com/_baks/tUX9/http://donbaham.com/Home_files/YS0P AzPxyeraes/,http://barnhart-studies.com/eln-images/vghg1nb/ ,http://blut.com/3dtech/jLu8IANnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLE/,http://realcourp.net/PhotoGallery/Uw mRHceSGbaCeGF/,http://miniflam.com/eln-images/fSwbQjUMAfGxdw/,http://marezdecor.com/MarezGallery/SEQxWtpMJ7A8ratY/". This behavior is characteristic of Emotet downloaders, which are known to drop further malware payloads.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • Workbook_Open macro high OLE_VBA_WBOPEN
    Workbook_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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12808 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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