Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 0e359c75cc5fedd7…

MALICIOUS

Office (OLE) / .XLSX

88.5 KB Created: 2022-02-14 05:58:53 Authoring application: Microsoft Excel First seen: 2022-02-22
MD5: 425336c316e3d6887f054f58cf6f5fe6 SHA-1: c513058d589425e87b0ad3a3955b30db0a60933b SHA-256: 0e359c75cc5fedd733f1255b3bb8fe56b97381b1ce40b7c5eda88f1df35d045a
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1204.002 Malicious File

The sample contains a Workbook_Open VBA macro that utilizes Windows Script Host to execute a VBScript payload. This script is designed to download and execute a second-stage payload from the reconstructed URL: http://wuiw.ama.cwdjjpr.org/znhuou.top/moded/0Qbd. The presence of Emotet-related heuristics and the detected ClamAV signature strongly indicate this family.

Heuristics 6

  • ClamAV: Doc.Downloader.Emotet02220-9940037-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.Emotet02220-9940037-0
  • 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
98ce64e756a4ee3d4f776c1541f7f3ad0f966d786db88eda74f9a833f3a74b83		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 11705 bytes

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