Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 94c0a50fb624d955…

MALICIOUS

Office (OLE) / .XLSX

151.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: a1de50768131fee4db41c0fc2b094b15 SHA-1: 4ddb6cd89fd64b7a36fad338f84c84d1c548c01c SHA-256: 94c0a50fb624d9556d03ea2886ea419e5f4046b65756956f54304d8ada0b360c
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is identified as malicious by ClamAV and contains VBA macros that trigger on workbook open. The script utilizes `CreateObject` to interact with `Wscript.Shell` and `RDS.DataSpace`. It constructs and executes a batch file (`c:\programdata\jledshf.bat`) and a VBScript (`c:\programdata\tghklsd.vbs`). The batch script contains a heavily obfuscated command that appears to download and execute payloads from multiple URLs, including `http://store.uxdummmit.com/wp-admin/VfgBA5Q7Z/`. This indicates a downloader functionality, characteristic of the Emotet family.

Heuristics 7

  • ClamAV: Doc.Downloader.EmotetExcel02222-9938901-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02222-9938901-0
  • 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
df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 12041 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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