Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 d01e23fbedda170b…

MALICIOUS

Office (OLE) / .XLSX

138.0 KB Created: 2022-02-09 09:48:26 Authoring application: Microsoft Excel
MD5: df2b54ee8a5208fb0f5a2b395e5cc8f9 SHA-1: 2345857d81f984a1bf58b6202201745f2d3878a3 SHA-256: d01e23fbedda170b29a8650d5f7069d6de129683bf925f3796ea27dfa66ec2a2
240 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is a macro-enabled Excel document identified by ClamAV as 'Doc.Downloader.EmotetRed02220-9938909-0'. The Workbook_Open macro is present and uses CreateObject to execute code. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://midnighsilverb.crafters.com/store/wBjNOUwc/B110N4cA6R3/', 'http://temp.com/NAT_05_22_2009/BI710N4cA6R3/', and 'https://redington.karmart'. It also creates batch and VBScript files in 'c:\programdata\'. The VBA code reconstructs the URL 'https://redington.karmart' from concatenated strings.

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
f4df1e3537296c938383f9d47a6456889c62d8697bb17efbea03aa85e9c1054b		 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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