Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 c141032e9037505a…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: e35abb03f63e4dc8fc775211e11d1e36 SHA-1: fa5aec0e95f42a465ebeed60b10d3fe06f2e3170 SHA-256: c141032e9037505adf43ef30222c8e1f782be9a5b43ec6456e1a44239bbd3ef9
240 Risk Score

Malware Insights

Emotet · confidence 95%

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

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate malicious intent. The VBA script contains obfuscated commands that reconstruct the following URLs for payload download: "http://midnighitsilverbcraft.com/store/wBjNOUw/B110N4cA6R3/,http://temp.com/NAT_05_22_2009/BI710N4cQA6R3/" and "https://redington.karmaat". It also attempts to save and execute a VBS file to 'c:\programdata\oue4hjld.vbs' and a batch file to 'c:\programdata\bhnasleil.bat', suggesting a downloader functionality.

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
64faee7e2db4c22418aec2a568248539e07af07504cc9277a5244106ab7b29e1		 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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