Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 32d6863ed70f6cfb…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: d52e3f575415094d0e656c8f31b27815 SHA-1: 5ba245cf57f6b68df90792978b7173c15ffa6948 SHA-256: 32d6863ed70f6cfbc37fdb87a8feb03366c35ec612108608cfe3e30fa3f1a506
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic for Applications T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The sample is a malicious Excel file containing VBA macros, specifically a Workbook_Open auto-execution routine. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighstilvercrafters.com/store/wBjNOUwc/B710N4cA6R3/' and 'http://temp.com/NAT_05_22_2009/BI710N4cA6R3/', and saves it as 'c:\programdata\oue4hjld.vbs'. It also creates a batch file 'c:\programdata\bhnasleil.bat' which appears to be related to the execution of the downloaded payload. The ClamAV detection explicitly names this as Emotet.

Heuristics 6

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
e6db570608b54236df409ed494184a00e931c462c264e968302771ae2378e7c6		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 52433 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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