Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 d2ec537287ecea98…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 8c8b736fa7720e6679a2bd12da8344b6 SHA-1: 813fe911f6b2699dc69cb525faf02b810b157ad0 SHA-256: d2ec537287ecea98f32d3fb91742f09c3631099470cd5d9fce6e0101461c29fe
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file contains a Workbook_Open VBA macro that utilizes Wscript.Shell to execute commands. The macro is designed to download and run a second-stage payload from a list of URLs. The presence of Wscript.Shell, the Workbook_Open auto-execution, and the download functionality strongly indicate a downloader, consistent with the Emotet family. The reconstructed URL is "http://santetortilla.com/_baks_/tUX9/,http://donbaham.com/Home_files/YS0PPAZPyeraes/,http://barnhart-studies.com/eln-images/vggh1nbcGEGf/,http://blut.com/3dtech/jLu8IANnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLE/,http://reacorp.net/PhotoGallery/UwRHCceSGbAcEGf/,http://miniflam.com/eln-images/fSwbQjUUMAfGxdw/,http://marezdecor.com/MarezGallery/SEQxWtpMJ7cA8rAtY/".

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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