Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 ce87244ef9f49d0f…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 84fe6ff407c1fa6a0cfb5bee1830bf94 SHA-1: d706d7cfe1873180ee0e65e3b88f70558feae01d SHA-256: ce87244ef9f49d0ff9bb421b533bacc10272a13b49ece0c4302a3c56cb028025
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample is identified as malicious by ClamAV with the signature 'Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0'. Heuristics indicate the presence of VBA macros, specifically a Workbook_Open event that uses CreateObject to execute code. The VBA script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighsilvercrafters.com/store/wBjNOUwc/BI710N4cQA6R3/' and 'http://tempra.com/NAT_E_05_22_2009/BI710N4cQA6R3/', and also references registry keys and executable paths like 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat'. The script's obfuscated nature and its intent to download and execute further stages are clear indicators of a downloader, consistent with Emotet's typical behavior.

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
29a3ab1d77b2b14f024635287a60da68e37bd14d70cc309e573f117277c7f0b8		 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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