Emotet — Office (OLE) / .XLSX malware analysis

Static analysis result for SHA-256 6119ce340bc2b382…

MALICIOUS

Office (OLE) / .XLSX

150.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel
MD5: c71f4d63fcff347bdf1d61c08446d808 SHA-1: 78001b0d90bfd7d5af8ad8830cd17ef51f538750 SHA-256: 6119ce340bc2b382e000cf0dec004d6ccc37513dc7634707f14226ecd7e2c0e7
302 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The sample contains VBA macros that trigger on workbook open, indicative of malicious intent. The macros are designed to reconstruct and download payloads from a list of URLs, as evidenced by the OLE_VBA_CELL_DROPPER_URL heuristic and the embedded URLs. The reconstructed command line in the DOC BODY indicates the execution of a batch file, 'c:\programdata\jledshf.bat', which likely serves as a downloader for further stages. The ClamAV detection and heuristic firings strongly suggest this is an Emotet variant.

Heuristics 8

  • URL reconstructed from VBA cell-staged base64 dropper (12 URLs) critical OLE_VBA_CELL_DROPPER_URL
    VBA reads worksheet cells, strips junk substrings via Replace(), and base64/UTF-16 decodes the result into a PowerShell EncodedCommand payload. The download URL is never contiguous in the file bytes; it was recovered by removing the macro's Replace() junk tokens from the cell strings and decoding the staged base64.
  • 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.
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://actividades.laforetlanguages.com/wp-admin/BlkdOKDXL/
    • http://sbcopylive.com.br/rjuz/w/
    • https://trasix.com/wp-admin/y5Aa1jt0Sp2Qk/
    • https://www.parkinsons.co.in/abc/Y6Y0fTbUEg6/
    • https://biz.merlin.ua/
    • http://bruckevn.site/3yztzzvh/nmY4wZfbYL/
    • https://pardiskood.com/wp-content/NR/
    • https://daujimaharajmandir.org/wp-includes/63De/
    • https://datasits.com/wp-includes/Zkj4QO/
    • https://anugerahmasinternasi
    • https://atmedic.cl/sistemas/3ZbsUAU/
    • https://anwaralbasateen.com/Fox-C404/mDHkfgebMRzmGKBy/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
006c4f4d54d1c9bb906763adb0bd849cdbbe9d88f3fa78ad2d18ef6987f96c37		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 8906 bytes

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