Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 be10e5e4b94fa966…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 6a58440b6ab518375cf8ec8f6dca3fe9 SHA-1: 176cfa6d8d490230908acda7154ca6d95919a185 SHA-256: be10e5e4b94fa966a44bf4895ed7e8592a5f0e7bd6f49674f652d68bfa091e73
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The sample contains VBA macros, specifically a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The macro utilizes Wscript.Shell to execute commands and download additional payloads. The reconstructed URL string 'http://sanetebortill.com/_baks/tUX9/,http://donbaham.com/Home_files/YS0PAaPxyeraes/,http://barnhart-studies.com/eln-images/Vcbhg1nb/,http://blut.com/3dtech/jLu8IANnj3gK9WC/,http://zenzebra.net/plath/9Q0DBle/,http://marezdecor.com/MarezGallery/sEQxWtpMJ7A8ratY0D/,http://miniflam.com/eln-images/u0vT/,http://realcourp.net/PhotoGallery/UwRHgceSGbaCeGF/,http://marezdecor.com/MarezGallery/sEQxWtpMJ7A8ratY0D/' indicates the download of further malicious content. The presence of executable files like 'yhjlswle.vbs' and 'ughldskbhn.bat' in the ProgramData directory further supports this. The ClamAV detection name 'Doc.Downloader.EmotetRed02220-9938909-0' directly attributes this to the Emotet family.

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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