Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 51cdede803ecd58a…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: c34375d3bad622eb6e772485fa57a410 SHA-1: 32aa7e3cc4e0abe858d967c70a935544a6c9208c SHA-256: 51cdede803ecd58a2df3f10be416dfa3ab8e02eace34aee3a1e3eb1634e81b69
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is a macro-enabled Excel document identified by ClamAV as 'Doc.Downloader.EmotetRed02220-9938909-0'. The Workbook_Open macro executes VBA code that uses CreateObject to download and execute a VBScript payload from a hardcoded URL. The script attempts to save the payload to 'c:\programdata\oue4hjld.vbs' and then execute it via a batch file 'c:\programdata\bhnasleil.bat'. The embedded script also contains multiple URLs that are likely used for downloading the second-stage payload, including 'http://midnighitsilverbcraft.com/store/wBjNOUwc/BI710N4cQA6R3/' and 'https://redington.karmaat'.

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
4eead72f788b3d304397b6197de695025a64db7793544bfa5911bd5011e021b9		 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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