Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 554a356a810996e3…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 6d28b347eb0f9fc819307a36aa43177a SHA-1: 03ee2bbba8c78412a2559b15dd553939ebdb00b9 SHA-256: 554a356a810996e3d9ba48aec61d384e459ab5100b48021efbafcb1a6c08691e
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 contains VBA macros, specifically a Workbook_Open event, which is a common delivery mechanism for Emotet. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighthilviewercraft.com/store/wBjNOUwc/B110N4cQ6R3/' and 'http://tempra.com/NAT_E_05_22_2009/BI710N4cQ6R3/', and saves it as 'c:\programdata\oue4hjld.vbs'. It also creates a batch file 'c:\programdata\bhnasleil.bat' which likely facilitates the execution of the downloaded payload. The ClamAV detection 'Doc.Downloader.EmotetRed02220-9938909-0' further supports the Emotet family attribution.

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
4613c253d22c03309764a55bb44fd90515da3a89922abcd746fbf59287905772		 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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