Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 f80692383f6fba6f…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: bd66764acfa72aa47a8d99a59fd539f6 SHA-1: 3797db2a3941703892ebc4c0765e8bc8564e7fb8 SHA-256: f80692383f6fba6f32a8e4dde5ddbce84566d9ff721442f56ea4412418f51143
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file contains a Workbook_Open VBA macro that uses CreateObject to interact with Wscript.Shell. The macro's primary function appears to be downloading and executing a second-stage payload. The reconstructed URL string 'http://youlandada.org/eln-image/n8DPZISf/,http://roseveideob.net/eln-images/EjdcOMlY8Gy/,http://vbaint.com/eln-images/H2pPGtE8XzENc/,https://framemaker.us/eln-images/U5W2IGe9m8i9hr/,http://niplaw.com/asoLidofuNdata,http://robertdownload.us/eln-images/DGI2YOkwS9XPOC/,http://mpmcomputing.com/fonts/JO5/,http://robertdownload.us/eln-images/DGI2YOkwS9XPOC/' indicates multiple potential download sources for the payload. The presence of a .bat file and .vbs file in the document body further supports the downloader and execution behavior. The ClamAV signature 'Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0' strongly suggests the Emotet family.

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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