Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 65d7497927421a2e…

MALICIOUS

Office (OLE) / .XLS

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: fc6b6e54aa038a46fb5e7acb3631b28e SHA-1: 7b4be741616453e68729e7905f17cce7c029eb91 SHA-256: 65d7497927421a2e1917b152c6e730c21726b57af99a54103d5ba281ef1e06da
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is an Excel spreadsheet containing a Workbook_Open VBA macro that uses CreateObject to instantiate Wscript.Shell and RDS.DataSpace. The macro appears to be designed to drop and execute a VBScript payload from the path c:\programdata\tjspowj.vbs and a batch file from c:\programdata\uidpjewl.bat. The batch file contains a heavily obfuscated command that attempts to download and execute a second-stage payload from multiple URLs. The ClamAV detection explicitly names Emotet, and the overall behavior is consistent with Emotet's typical downloader functionality.

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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