Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 e5fe3310b6acf6fd…

MALICIOUS

Office (OLE) / .XLSX

122.5 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: bb3b48e3af9ab2f64d8fa90925ba19d7 SHA-1: 5b84d6476da78a3325b78d1b7c27fdc809cabec2 SHA-256: e5fe3310b6acf6fda851b11c9df651122892fb574e1b819993e086019e492b2e
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0', strongly suggesting the Emotet family. High-severity heuristics indicate the presence of a Workbook_Open VBA macro that uses CreateObject to execute code. The VBA script attempts to download and execute a second-stage payload from multiple URLs, including reconstructing the URL 'http://midnighitsilvercraft.com/store/wBjNOUw/B710N4cA6R3/' and 'http://tempra.com/NAT_E_05_22_2009/BI710N4cA6R3/', and also attempts to write a VBS file to 'c:\programdata\oue4hjld.vbs' and a batch file to 'c:\programdata\bhnasleil.bat'.

Heuristics 6

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
76c27f24f5d0163155743bc8af1919127b7231af00b8a3a889984c2edd22b3c5		 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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