Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 7418adf408ffb413…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: b28bc348cb76540007ddaed4e32e4c13 SHA-1: 037fd521598eb15debcfac5be7330cb8c3ee608f SHA-256: 7418adf408ffb41392d3c43cdb4aad76bb3be916af97516e92279e2adae209b9
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file contains a Workbook_Open VBA macro that leverages CreateObject to instantiate Wscript.Shell, indicating an intent to execute scripts. The macro also constructs a batch command that includes a long, obfuscated string which appears to be a Base64 encoded payload. This payload is likely intended to download and execute a second-stage malware. The ClamAV detection name 'Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0' strongly suggests the Emotet family and its downloader capabilities.

Heuristics 6

  • 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.
  • 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

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