Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 fc2593796c40b5ca…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 3fe30baf86233573c999ab05bc961180 SHA-1: 6312f9d48c238c4ac6fb91fde48fc048ff7a1309 SHA-256: fc2593796c40b5cae981adc58799667518b53c16bdf9c6e5160bd34c928c0599
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0. The Workbook_Open macro is present and uses CreateObject to execute Windows Script Host, indicating a downloader. The DOC BODY contains obfuscated commands that reconstruct a VBScript payload and a batch file, which are likely responsible for downloading and executing a second-stage payload from the provided URLs. The reconstructed VBScript payload is: "http://youlanda.org/eln-images/n8DPZISf/ ,http://rosevideop.net/eln-images/EjdcOMlY8Gy/ ,http://vbaint.com/eln-images/H2pPGtE8XzENc/ ,https://framakeers.us/eln-images/U5W2IGE9m8i9hr/ ,http://niplaw.com/asons/JO5/ ,http://roberflod.us/eln-images/DGI2YOkw9XPO/ ,http://mpmcomputing.com/fonts/JO5/ ,http://roberflod.us/eln-images/DGI2YOkw9XPO/".

Heuristics 7

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13985 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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