Emotet Office (OOXML) / .XLSX malware analysis — malicious · f430d1bdc1417465

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: b201cafff7e567ebe392dbdb7dc79b79 SHA-1: a5d1f3cf9218471f2fdafc7c60a1d432d3d3060c SHA-256: f430d1bdc14174653a482812fa1c46ae5b935bef14c761573e03a5a7c97ad0d9

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1059.005 Visual Basic

The file is identified as malicious by ClamAV with a signature indicating it's an Emotet downloader. The presence of a Workbook_Open macro and CreateObject calls, along with the embedded PowerShell command, strongly suggests a downloader functionality. The PowerShell command attempts to download and execute a payload from multiple URLs, including 'http://sumedhaonline.com/wp-content/HyzNXJ300XQVBSRH/', and also creates batch and VBScript files at 'c:\programdata\jledshf.bat' and 'c:\programdata\tghklsd.vbs' respectively.

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` `5054ba39cc54e6f79486e21d24ac674a60e9cc738ce4e6f64e5d6d71c76c0dcc`	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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