Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 599d526a5ccb2ffd…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: 7e7154c74f89537fadeec260d3116bfd SHA-1: e7e002f217f7f3311e2b2560b6ae10a72370725d SHA-256: 599d526a5ccb2ffdc33282577d5e7afe68803fe362a51b355213b9c1df4ab6f2
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 is a macro-enabled Excel file containing a Workbook_Open macro that executes a VBScript. This script is designed to download and execute a second-stage payload from the URLs 'http://midnighitsilverbcraft.com/store/wBjNOUw/B710N4cQ6R3/' and 'http://tempraal.com/NAT_E_05_22_2009/BI710N4cQ6R3/', and also 'https://redington.karmat'. The script also attempts to drop files named 'oue4hjld.vbs' and 'bhnasleil.bat' to 'c:\programdata\'. The ClamAV detection 'Doc.Downloader.EmotetRed02220-9938909-0' strongly suggests the Emotet family.

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
a634578b66c8acb7018d32e4b1285f9673e20d214d8c9ccd0e0454363c957c5e		 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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