Emotet — Office (OOXML) / .XLSX malware analysis

Static analysis result for SHA-256 62e71dacf3ef33f1…

MALICIOUS

Office (OOXML) / .XLSX

115.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000
MD5: 2bf5c385f9ea6f4e2d26b05e8ccc89e1 SHA-1: f6b99b44a766f81363419b3ba5556a2075c00569 SHA-256: 62e71dacf3ef33f1d8b356e51b7e856a764756a39fff1f47bbd231a20004de6f
200 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV heuristic and high-severity VBA heuristics indicate this is a malicious Excel document. The Workbook_Open macro and CreateObject calls suggest the execution of embedded VBA code. The obfuscated PowerShell command within the DOC BODY, specifically the string 'http://sumedhaonline.com/wp-content/HyzNXJ30XQEBSRH/, http://divachintextiles.com/wp-incluedes/WWHWRks8KvNm6/, http://hotelalandmalabol.com/1520/bUdhoEPdf/, http://shwenantawin.com/copma/XTnZii02vfgV', indicates the intent to download and execute a second-stage payload. The presence of Emotet-related indicators further supports this conclusion.

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
22aca9f97589327b89343b0085b0770b71567da44a717b3117b650afb8dcbe1b		 vba-project OOXML VBA project: xl/vbaProject.bin 42496 bytes

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