Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 33ab3301d6442a9c…

MALICIOUS

Office (OLE) / .XLSX

151.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 4208e3b5001e5e45601be1f1aa5d2b3d SHA-1: bae7f6a2be69c4363bdb407b83080ec1da48098a SHA-256: 33ab3301d6442a9c27b70fc9b7f262d6e006a75d7995a45466dc78f2969b7454
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1059.005 Visual Basic

The file is a macro-enabled Excel spreadsheet containing VBA code that executes obfuscated PowerShell commands. The PowerShell commands are designed to download and execute further payloads from multiple URLs. Specifically, the script reconstructs the following download URLs: 'http://store.uxdsummit.com/wp-admin/VfgBASQ7Z/', 'https://glowerntals.com/wp-admin/f1zezAKG7nS6I/', 'http://candise.bimteractivegroup.com/1g94ngo/2n7wJoPuPDaenPcX/', and 'http://bacchileatoropociclos.org/'. The presence of 'CreateObject' and 'Wscript.Shell' calls, along with the 'Workbook_Open' auto-execution, strongly indicates a downloader functionality, consistent with the Emotet family.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02222-9938901-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02222-9938901-0
  • 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
df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12041 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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