Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 9880595c8a57da80…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 41f917a7ae30cc1e19f286e84f7bcd21 SHA-1: de4e3a43e1eb6712a8536d88b2febfca3c54d3ea SHA-256: 9880595c8a57da80baedc4aad4843e5719f3feda8f52d70632706a9d72fd682e
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains VBA macros that leverage `CreateObject` to instantiate `Wscript.Shell`, indicating an intent to execute commands. The `Workbook_Open` auto-execution event is present, suggesting the macros run automatically upon opening the document. The script attempts to download and execute payloads from multiple URLs, including a reconstructed URL: `http://santoertillala.com/_baks/tUX9/http://donbaham.com/Home_files/YS0PAPzYeraes/,http://barnhart-studies.com/eln-images/vggh1nb/ ,http://blute.com/3dtech/jLu8IANnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLE/,http://reacour.net/PhotoGallery/Uw mRHceSGbaCeGF/ ,http://miniflam.com/eln-images/fSwbQjUMAfGgdw/,http://marezdecor.com/MarezGallery/SEQxWtpMJ7A8ratY/`. It also writes suspicious files to `c:\programdata\yhjlswle.vbs` and `c:\programdata\ughldskbhn.bat`. The ClamAV detection name further supports the Emotet family attribution.

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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