Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 d5b9dc114a97d119…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 6032113aa27b1d451a0168fa0140bd8c SHA-1: 44443af1e5119c4dc0c6009c4238233a00829cd4 SHA-256: d5b9dc114a97d11963ce37790851b60ab352a8fc54553a96cb1b37e53b10fe63
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open, CreateObject, and p-code auto-execution strongly indicate a malicious Excel document. The Workbook_Open macro is designed to execute obfuscated commands that appear to download and execute a VBScript payload from a hardcoded URL. The reconstructed URL is "http://midnighsilverb.crafters.com/store/wBjNOUw/BI710N4cA6R3/". The presence of Emotet-related indicators in the ClamAV signature further supports this family attribution.

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
30e4d8e69d19c31264f2765513e73d0b425894a04799d042d264fc4d532fb222		 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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