Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 7436590707364691…

MALICIOUS

Office (OLE) / .XLS

438.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel First seen: 2022-02-24
MD5: 4c05d9ad1eddfece9e16c9e26b65a2f0 SHA-1: 6762e7efc2b4a2e23d898934fad036a60a9c5ac2 SHA-256: 74365907073646915fdd888784af85031f8f467cce15e5502780315b99a6229e
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1105 Ingress Tool Transfer T1566.001 Spearphishing Attachment

The sample is an Excel file containing VBA macros, specifically a Workbook_Open macro that uses CreateObject to execute Windows Script Host. The script attempts to download a VBS file from a constructed URL and execute it. The ClamAV signature 'Doc.Downloader.EmotetExcel02222-9938901-0' strongly suggests the Emotet family. The reconstructed URL for the payload download is 'http://wgweishgweicrgweipgweit.sgweihgweil.com/abine'.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetExcel02222-9938901-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02222-9938901-0
  • 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
eb472f393cd8fb353f72f2f3a25c9b61be0d56af4f72f00216b7960eeab5801f		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11223 bytes

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