Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 7806bb5ed6241a1c…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: ee8f22339b7f8c2255ac8fae50e988de SHA-1: d18dd1f03adf66651952151818415df6a0ff4ff0 SHA-256: 7806bb5ed6241a1c982ee807f5950ba1ab257cdd095a43fec380c8081a4e1f25
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros that trigger on workbook open, indicative of Emotet activity. The macro uses CreateObject to execute Windows Script Host and attempts to download and execute a second-stage payload from multiple URLs. The reconstructed command line indicates the use of PowerShell to download and execute a file from a list of URLs, with the primary URL being 'http://youlandada.org/eln-imageges/n8DPZISf/'. The presence of 'Wscript.Shell' and the download functionality strongly suggest a downloader role.

Heuristics 6

  • 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.
  • 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

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