Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 98661fa827111fc0…

MALICIOUS

Office (OLE) / .XLS

142.5 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel
MD5: 314dc9e01dd07241ae07e7e2695968c4 SHA-1: bbf9cd5bd310bf938679046afbf826c1be5e5431 SHA-256: 98661fa827111fc0fd98b2209d94ed30249e750da844f9011ee5ddea364f989d
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1059.005 Visual Basic

The file contains a Workbook_Open macro that leverages Wscript.Shell to execute a batch file and download additional payloads. The macro's logic reconstructs a long string of URLs, indicating a downloader functionality. The presence of Wscript.Shell and the reconstructed URLs strongly suggest Emotet's typical download and execution behavior. The batch file `c:\programdata\rtyusdj.bat` is also a direct indicator of execution.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
  • Reference to Windows Script Host high SC_STR_WSCRIPT
    Reference to Windows Script Host
  • 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
ffa342a8bb4eb541fe833e6254cf3f6e2f7d6f5436c011440a061030b6684f64		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6473 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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