Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 fe7fe662a0d06410…

MALICIOUS

Office (OLE) / .XLSX

123.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: a687d51fbd4c0b3e985730d3fc9c9f61 SHA-1: ba24b198908e9207cd0bedf9353d874179a277d5 SHA-256: fe7fe662a0d064103f823c59bc6716e507e908aaa1980c2cc2af7b2fd9f61b2b
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 VBA macros, specifically a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The macro utilizes `CreateObject` to call `Wscript.Shell`, indicating an attempt to execute commands or scripts. The document body and script content reveal the construction of commands that download and execute files from multiple URLs, including the reconstructed URL "http://harperhoproducts.com/Merchandise2/ARSf1LIcOauhH1rDrIHA/". The presence of `c:\programdata\yhjlswle.vbs` and `c:\programdata\ughldskbhn.bat` suggests the dropped payload locations.

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
de7bcbc45ff0a77d05d9af662bacc316e71be11a980e94f6673e556a5dd9d1bc		 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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