Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 28165675e1d314f6…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: f032d541057879052d14a2d98c1980b4 SHA-1: 4d0afef94b99137223ca7205af2b5b4b68d49bf2 SHA-256: 28165675e1d314f6080b8c9321e6f93469ddd75a946881f018f08470a837ced6
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The sample contains a Workbook_Open VBA macro that executes a command to download and run a VBScript payload from a remote URL. The script also attempts to create a batch file. The presence of the 'EmotetRed' ClamAV signature and the download/execution pattern strongly suggest Emotet. The reconstructed URL for the payload is 'http://midnighthsilvercrafters.com/store/wBjNOUw/BI710N4cQA6R3/'.

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
81269e3be5906cd6954bc5500f9dc07093fc311af574ce7fe43252e41a470800		 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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