Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 3d39410c5de87994…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 5b84e3851accf8cda60db8919e6a5b17 SHA-1: 1ead4be0cb258dea2be00e7584f53250d9da7268 SHA-256: 3d39410c5de87994dce2b4ca35b28d6ef31084ee51c0ac8953f56c3ebc8250a2
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 critical ClamAV detection and high-severity heuristics for Workbook_Open and CreateObject indicate a malicious macro-enabled document. The VBA script contains obfuscated commands that reconstruct the following URLs: 'http://midnighthilivercrafters.com/store/wBjNOUw/710N4cA6R3/' and 'https://redington.karmaat'. It also attempts to drop and execute files named 'oue4hjld.vbs' and 'bhnasleil.bat' in the 'c:\programdata' directory. The script's primary function appears to be downloading and executing a second-stage payload from the identified URLs.

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
c2dc69b8471f624c6402943b09db9b7778a2a90c95278e9f86d7c88f9d2da7fe		 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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