Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 6352cdc70b7c6ce2…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 06f91ee45b834ec0cfca9e1c530c3397 SHA-1: 495bcebbb93587be17a241292f622f59bcce3a2f SHA-256: 6352cdc70b7c6ce20a7d9b91a6cd827427f0115d6d51216fe92be651ebbac259
300 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file contains a Workbook_Open VBA macro that is heavily obfuscated and uses CreateObject to instantiate Wscript.Shell. This script is designed to download and execute a second-stage payload. The reconstructed URL string `http://santoetortillala.com/_baks/tUX9/http://donbaham.com/Home_files/YS0PZPyeraes/,http://barnhart-studios.com/eln-images/Vgbg1n/,http://blute.com/3Dtech/jLu8IAnnj3gK9WC/,http://zenzebra.net/plath/9Q0DBle/,http://realacorp.net/PhotoGallery/UwmRHceSGbaCeGF/,http://miniflam.com/eln-images/fSwbQjUMAfGxdw/,http://marezdecor.com/MarezGallery/SEQxWtpMJ7A8rtYDO/` indicates a downloader attempting to fetch further malicious content. The presence of Emotet-related heuristics and the ClamAV signature further support this assessment.

Heuristics 7

  • Obfuscated auto-exec VBA loader critical OLE_VBA_OBFUSCATED_AUTOEXEC_LOADER
    Auto-exec VBA reconstructs strings with a heavy custom decoder (numeric char-array, repeated hex-string decode, or junk-token Replace removal) and feeds them to a COM-instantiation or execution sink. This obfuscated-loader shape keeps CreateObject/Shell/URL indicators out of the macro source.
  • 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.
  • 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

Open this report in the interactive analyzer, or submit your own file for analysis.