Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 1b2fd268b6e91499…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 1fa73728994bade97c3c8837b1276dc6 SHA-1: 40b503ba4da37737e6691af36183f52f3d684494 SHA-256: 1b2fd268b6e9149915c90834f98326ee120b2c8b937870c7064603c9f601a09e
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The sample is a macro-enabled Excel file detected as Emotet by ClamAV. The Workbook_Open macro executes CreateObject, indicating a malicious intent to download and run a second-stage payload. The script attempts to create a VBS file at 'c:\programdata\oue4hjld.vbs' and a batch file at 'c:\programdata\bhnasleil.bat', which likely facilitate the execution of the downloaded payload from the provided URLs.

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
06e80300533d5c2ae517cd0bd21609747471863caa373b7e8c709f259a3a2292		 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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