Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 2e23d56536654582…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: d8c4dfd80aaec3f8f8428a525b71b3c8 SHA-1: df74748b522f713982a7cf0258a9c96b803b362e SHA-256: 2e23d56536654582dc321b13b61e60dea6b46889e115ec5d94417bb90ba1f159
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is a macro-enabled Excel document that triggers a Workbook_Open event. This event executes VBA code that utilizes Wscript.Shell to create objects and write malicious VBS and BAT files to disk. The script also attempts to download payloads from multiple URLs, including a reconstructed URL: 'http://santoetortilla.com/_baks/tUX9/http://donbaham.com/Home_files/YS0PPAzYeraes/,http://barnhart-studies.com/eln-images/Vggh1ng/ ,http://blute.com/3Dtech/jLu8IAnnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLE/,http://reacour.net/PhotoGallery/Uw mRHceSGbaCeGF/,http://miniflam.com/eln-images/fSwbQjU M AfGxdw/,http://marezdecor.com/MarezGallery/sEQxWTPj7A8rAtY0D/'. This behavior is consistent with Emotet's typical download and execution chain.

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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