Emotet — Office (OLE) / .XLS malware analysis

Static analysis result for SHA-256 4ccb69344b6da4ce…

MALICIOUS

Office (OLE) / .XLS

144.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 9658fe5e451b325850117b9e2bb1f339 SHA-1: 70451117b92af7d95cba02a3bc8e2a872b469692 SHA-256: 4ccb69344b6da4ce7e4a499e143d5ad990e02fa8450a99531b6a2c900bef13f8
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1566.002 Spearphishing with Other T1059.005 Visual Basic

The file is an Excel document containing VBA macros that are automatically executed upon opening via the Workbook_Open event. The macros contain obfuscated shell commands, including calls to `wscript.shell` and `cmd.exe` to download and execute a second-stage payload from multiple URLs. The presence of `CreateObject` and `Wscript.Shell` heuristics, along with the specific ClamAV detection name 'Doc.Downloader.EmotetExcel02226-9938630-0', strongly suggests Emotet family activity.

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
e5cfab216070fe1e4cc99c114be1118111da457aa00152d1441ffb86ba5a4299		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8906 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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