Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 9117107e45fe34b2…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 3ab19baaf06eb68b09952fea3f81cc6b SHA-1: d9515d2bb7b16b50255d41a82eb175def55423cd SHA-256: 9117107e45fe34b22e545fcdd1d00c9d362b7ca4ed93a560bd44de06f5b2a4aa
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is a macro-enabled Excel document identified as Emotet by ClamAV. The Workbook_Open macro executes a CreateObject call, which is used to download and execute a VBScript payload from a hardcoded URL. The script also attempts to create a batch file. The reconstructed URL for the payload is 'http://midnighsilverbcraft.com/store/wBjNOUwc/B110N4cA6R3/'.

Heuristics 6

  • ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
  • 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
b6df0493979fa2c735983c04be72d323d5acf7fd5e9f3317de90e5df1f86def9		 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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