Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 7968f2e1bdde473e…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 52650b2e2149aaf39de72deb91ceb348 SHA-1: 2210f70b9ec8fccca2ca0c33b1c8f5edb1336cfa SHA-256: 7968f2e1bdde473eacee79270a759d02a800fd4cbbbd1eddbb3a32fb90551868
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The sample contains VBA macros, including a Workbook_Open auto-execution event, which is a common delivery mechanism for Emotet. The script attempts to download and execute a second-stage payload from a hardcoded URL. Specifically, it constructs the command to execute a VBScript from 'c:\programdata\oue4hjld.vbs' and a batch file from 'c:\programdata\bhnasleil.bat'. The extracted URLs are highly suspicious and indicative of malware distribution.

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
f6092ff5ffe8ddc63e8fda8a0019274dfdca78ec436e4e3891c6d02aff3b8071		 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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