Emotet Office (OOXML) / .XLSX malware analysis — malicious · d3994055588af94c

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 17c41146e4ad7ad4723aac25875240eb SHA-1: d4b1ee796f2e385421626b95bd4877b519d77222 SHA-256: d3994055588af94cdbd282bc718c122335104cc74dbebbc2eec6e33d94b5195b

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV heuristic directly identifies this file as 'Xls.Downloader.EmotetExcel02223-9938902-0', strongly indicating the Emotet family. The presence of a Workbook_Open macro and CreateObject calls, combined with the embedded VBA script, confirms a macro-based execution flow. The script contains heavily obfuscated PowerShell commands, including a reconstructed URL: 'http://sumedahonline.com/wp-content/hyzNXJ30XQEVSBRHG/https://divachintextile.com/wp-inculdades/WHwWRKs8KvzfNfM/,http://hotelalandmalabo.com/1520/bUdhpEPdf/,http://shwenantawin.com/copma/XTnZiI02vfg', which is likely used to download and execute a secondary payload. Additionally, it attempts to write to 'c:\programdata\jledshf.bat' and '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` `b7967f593a46e080c761d9b754ee11b37c94aaf89ad9d84900551a89fa2fe0dc`	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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