Emotet Office (OOXML) / .XLSX malware analysis — malicious · 535170dc0a6aab21

MALICIOUS

Office (OOXML) / .XLSX

115.1 KB Created: 2015-06-05 18:17:20 UTC Authoring application: Microsoft Excel 12.0000

MD5: dd1bb1ea00bec1b7c279977cf946fe2c SHA-1: 4484b8bde74da1477a424171a0406b0727751f17 SHA-256: 535170dc0a6aab211fef9b87a6bc004d12aea077a4cd0fffc45e59a60c96549e

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell T1059.005 Visual Basic T1105 Ingress Tool Transfer

The file is an Excel macro-enabled document detected as Emotet by ClamAV. The Workbook_Open macro executes a batch script, 'jledshf.bat', which in turn is responsible for downloading and executing a second-stage payload from multiple URLs. The script also creates a VBScript file, 'tghklsd.vbs', likely for further execution or persistence. The reconstructed URL is "http://sumedhaonline.com/wp-content/HyzNXJ30XQEVcBSRH/ , http://divachintextiles.com/wp-incluedes/WWhWRks8KvNzNFm6/, http://hotelalandmalabol.com/1520/bUdhEPdf/ , http://shwenantawin.com/copma/XTnZii02yvf".

Heuristics 5

ClamAV: Xls.Downloader.EmotetExcel02223-9938902-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetExcel02223-9938902-0
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
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 project inside OOXML medium OOXML_VBA

Document contains vbaProject.bin — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `df1eb14c222394595c0518b49eec2b55ed9573146c5f1717dedceddd2e199a2b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	12041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.
`vbaProject_00.bin` `9e04776cfda3ef944141d2e7d462a767d29bf73a0b35db492e8280d3ab2c9579`	vba-project	OOXML VBA project: xl/vbaProject.bin	42496 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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