Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 cee94ea5cbd19cdf…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 3f8ee43eab65ff434c6f7fb85060329e SHA-1: db9aee25640a6e67cc59e99a07e934a32acf647a SHA-256: cee94ea5cbd19cdf0d0355bb8ac2f932052170206abbe055631cd9439f47deb0
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The file is detected as Emotet by ClamAV and contains VBA macros that execute upon opening the workbook. The script attempts to download and execute a VBScript payload from multiple URLs, including 'http://midnighsilverbcraft.com/store/wBjNOUwc/B110N4cQ6R3/' and 'http://tempraal.com/NAT_05_22_2009/BI710N4cQ6R3/', and also attempts to create a batch file at 'c:\programdata\bhnasleil.bat'. The script also reconstructs a URL from concatenated strings: 'https://redington.karmart'. This indicates a downloader functionality typical of Emotet.

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
c70c3b860c326ca243a1e408c4bed99a50048174ec80d3f1fb8adffb3413a836		 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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