Emotet Office (OOXML) / .XLSX malware analysis — malicious · 9db37a810689ab09

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 43bcafb5985ed859cab1b97db8e6fd82 SHA-1: 1f03edf888d356c04b4169092233af5a1c981f4b SHA-256: 9db37a810689ab094b95754d3e7564a7d6748672f96a476ba3da397ecd566979

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetExcel02223-9938902-0. It contains a Workbook_Open macro that uses CreateObject to execute a batch file and a VBScript. The script content reveals it attempts to download a second-stage payload from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/', and save it as 'jledshf.bat' in the 'c:\programdata\' directory. The script also attempts to execute a VBScript from 'c:\programdata\tghklsd.vbs'.

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` `db23191fa5c5ee8d41a58a0881c97628fe28b57f7ba5b3c44d0f70c7a7e73508`	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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