Emotet — Office (OOXML) / .XLSX malware analysis

Static analysis result for SHA-256 6dad865a61f5950b…

MALICIOUS

Office (OOXML) / .XLSX

115.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000
MD5: 61144c314827925915187b93d291fa51 SHA-1: 6fff3d57c1dbace38a75422b52ecea16b77fea76 SHA-256: 6dad865a61f5950ba940bc7dfddd3860db4a407ff4aa6ed1cd74dc260d465be4
200 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is detected as Emotet by ClamAV and contains a Workbook_Open macro that executes obfuscated PowerShell. The PowerShell command attempts to download and execute a second-stage payload from multiple URLs, including 'http://sumedhaonline.com/wp-content/HyzNXJ30XQEVcBS RH/'. The macro also creates a batch file at 'c:\programdata\jledshf.bat' and a VBScript at 'c:\programdata\tghklsd.vbs', likely for persistence or further execution.

Heuristics 5

  • ClamAV: Xls.Downloader.EmotetExcel02223-9938902-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.EmotetExcel02223-9938902-0
  • 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 project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 12041 bytes
vbaProject_00.bin
9a52efaec91414b4f1e6002951e75875845a82387f091b309fa83964d0b261ca		 vba-project OOXML VBA project: xl/vbaProject.bin 42496 bytes

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