Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 3a825c3015ae4d29…

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 71caca2048f2ff18ec297bbf890bcc9e SHA-1: 9bacd6c6dc434c10cdd2553c27d83a4eec50e6fa SHA-256: 3a825c3015ae4d2989bee147e038e936be893e088d5aa7e59703b96eddc26f3b
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains a Workbook_Open VBA macro that executes a command using CreateObject and Wscript.Shell. The macro constructs a complex command string that includes multiple URLs, likely for downloading and executing a second-stage payload. The presence of 'Doc.Downloader.EmotetRed02220-9938909-0' in the ClamAV detection further supports the Emotet family attribution. The reconstructed URL string is: "http://santoetortilla.com/_baks/tUX9/http://donbaham.com/Home_files/YS0PAPA ZxYeraes/,http://barnhart-studies.com/eln-images/Vggh1n/,http://blut.com/3Dtech/jLu8IAnnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLe/,http://realacorp.net/PhotoGallery/Uw mRHceSGbAcEGf/,http://miniflame.com/eln-images/fSwbQjU M AfGgdw/,http://marezdecor.com/MarezAgallery/SEQxWTpMJ7A8rAtY/," which is used to download and execute a malicious payload.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • 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
7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12808 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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