Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 9bb5a38a7584feee…

MALICIOUS

Office (OLE) / .XLSX

141.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: 00424244e95268aa43047e69d8ad54c5 SHA-1: 6f3dc8add3fd328d999c3591adeaa78c83ae59e3 SHA-256: 9bb5a38a7584feee671e7967b91d01a93ec9489b5ddd6837086d178f3228b038
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file contains VBA macros, specifically a Workbook_Open macro, which is a common delivery mechanism for Emotet. The script attempts to download and execute a second-stage payload from multiple URLs. The presence of Wscript.Shell and the creation of a .bat file in ProgramData further indicate malicious intent. The ClamAV detection ID also strongly suggests Emotet.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
  • 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.
  • 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
7cae011969aa9023a96862024ae54721dc634690f8d21045a624f9f2ddcc442e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4177 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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