Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 3f5760d1b90bdb14…

MALICIOUS

Office (OLE) / .XLSX

144.0 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: 3347f314c0d340782542d8b991158a67 SHA-1: cf1913a035657c923b943f98887c6f31e1378955 SHA-256: 3f5760d1b90bdb14ee999b6f47f5505894a7e81761d0b1807f210b5e32ee2f7a
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file contains a Workbook_Open VBA macro that is configured to execute a batch file and then download and execute a second-stage payload. The macro uses CreateObject to instantiate Wscript.Shell, which is then used to execute commands. The reconstructed URL is "http://four.renovatio.lt/wp-includes/KGzoB0zsrKzjqEje/,http://adulteriendfinder-adultfriends.com/mmfdoublepenebration/0pcEEjPfwMU/,http://jwellerly.fameitc.com/wp-7z9cEcwCUg/,http://arcgakuin-dev2.sukob.com/l35uhr/R1evmjjhag/,http://hostfeeling.com/wp-admin/DidtoZk2EEc7BXyh/,http://gardenfilm.com/wp-content/Ef/,http://moneymagnetentertainment.com/pz66t8y/Bd0sR0hAD8mHibNjrk/,http://https://secures.com/l35uhr/R1evmjjhag/". The batch file is located at c:\programdata\uylcsekn.bat. This behavior is characteristic of Emotet downloaders.

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
022b6ea87e671715cd07f596eceb5d45e85534a367868a0e820c8aa5cb013822		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6734 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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