Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 9e67a35c106f9530…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 0a8d86a52ef7f431472b2072ce59f10a SHA-1: 47faa0a902ef6e0e65142cee061da07a3eb3754b SHA-256: 9e67a35c106f95308d8a66d483677464f389d952776b95777ff885bd6aface2d
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The file is a macro-enabled Excel document detected as Emotet by ClamAV. The Workbook_Open macro is configured to execute a command that creates and runs a batch file. This batch file, in turn, appears to download and execute a VBScript payload from multiple URLs. The script also attempts to create a scheduled task. The presence of the Workbook_Open macro and the CreateObject call strongly indicate malicious intent.

Heuristics 6

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
3e980b9461b65753a689fb19f01ebbc665b61f70b10b3f1217e64cb0805056c1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 52433 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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