Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 25d8906d0a04b2c5…

MALICIOUS

Office (OLE) / .XLSX

150.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 977f16c75905fd225ecd712d7c787c32 SHA-1: a27455d4af50d9faf9d848b64b5a960b68ad06a7 SHA-256: 25d8906d0a04b2c5dd45e14494cd8865d860399254343bbc7db154cc7e3a93a5
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, CreateObject, and Workbook_Open indicate malicious intent. The VBA script uses Wscript.Shell to execute a batch file located at 'c:\programdata\jledshf.bat'. The script also contains obfuscated URLs that are likely used to download additional payloads. The presence of 'EmotetExcel' in the ClamAV detection further supports the Emotet family attribution.

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
006c4f4d54d1c9bb906763adb0bd849cdbbe9d88f3fa78ad2d18ef6987f96c37		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8906 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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