Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 bc334dcd2247bcce…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: a4b8b867ba3dc8055428907ebfce754e SHA-1: 973be9fce1acf956c3593d3f0f04223a70231df8 SHA-256: bc334dcd2247bcce93da25ac2fbb03a7d2fede25c8155a1957a570c97eda15fd
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1059.003 Windows Command Shell

The sample is an Excel file containing VBA macros, specifically a Workbook_Open auto-execution macro. The script attempts to download and execute payloads from multiple URLs, including 'http://midnighthilivercrafters.com/store/wBjNOUw/B710N4cA6R3/' and 'http://tempraal.com/NAT_E_05_22_2009/BI710N4cQA6R3/', and writes them to disk as 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat'. The ClamAV detection explicitly names this as 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
bb3adee4b8746e2c69b0c1d844e3a70fecacb0fc72177ffc2add60644afc80b4		 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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