Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 3b956ad5094df2f6…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: d86c2c44df378964dab5ad88d1de7d8d SHA-1: 6f90a9ae9a210ee3c6043c2e01864a5aea798146 SHA-256: 3b956ad5094df2f605c6ab8498425a0ae1d277fbd84b54f5c802fc125be31bcd
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

The sample contains a Workbook_Open VBA macro that references Wscript.Shell and CreateObject, indicating it's designed to execute commands. The macro likely downloads and executes a second-stage payload using the reconstructed URL: "http://youlanda.org/eln-image/n8DPZISf/ ,http://roservideob.net/eln-images/EjdcOMlY8Gy/,http://vbaint.com/eln-images/H2pPGtE8XzEN/,http://framemaker.us/eln-images/U5W2IGE9m8i9r/,http://nipalaw.com/asolidfou nada/ ,http://robertflolod.us/eln-images/DGI2YOkSc9XPO/,http://mpmcomputing.com/fonts/JO5/,http://robertflolod.us/eln-images/DG I2YOkSc9XPO/". The presence of a .bat file and .vbs file in the document body further supports this malicious intent. ClamAV detection confirms this as Emotet.

Heuristics 7

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13985 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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