Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 396d022ca4f63bd2…

MALICIOUS

Office (OLE) / .XLSX

121.0 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: 96982497efa563d1a7f5396f10ea25a4 SHA-1: f42c5cbf01ac0cc273fd9b9f8c91dc2ab793af01 SHA-256: 396d022ca4f63bd2f124a5e664817f08ad2782ec0f7f68c7e90df88148e61b2b
280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1566.002 Spearphishing Attachment

The sample is identified as malicious by ClamAV with a signature indicating Emotet. The Workbook_Open macro is configured to execute a VBScript payload, which in turn creates a batch file and executes it. The batch file contains obfuscated commands that appear to download and execute further payloads from the provided URLs. The reconstructed URL from the obfuscated script is 'http://aliveystem.com/eln-images/pm2rSnsVM/' and 'http://don-lee.com/_notes/UH1A'.

Heuristics 7

  • ClamAV: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Downloader.Emotet-ab81c42b2bd4747e-9951196-0
  • 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
faf50200d5a9adeeda00cc1da1bbf8f6abf0317a1e97a58db8ae804ba12ba446		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 13985 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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