Emotet Office (OOXML) / .XLSX malware analysis — malicious · 21b88d8e321ae688

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: fefc6992efb5a3d4665669a29c727529 SHA-1: 1d9f6245324b318642f940b3d12ed1dfe87e07e3 SHA-256: 21b88d8e321ae688ae4a8400325e8e29f51addc168033492455d43791b448471

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetExcel02223-9938902-0', indicating it is likely an Emotet downloader. The presence of a Workbook_Open macro and CreateObject calls strongly suggests malicious VBA code execution. The obfuscated DOC BODY content reveals commands to create and execute batch and VBScript files, and reconstructs a URL string: 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/ or http://divachintexiles.com/wp-incluedes/WWhWRKs8KvNzFm6/ or http://hotelalandmalabo.com/1520/bUdhoEPdf/ or http://shwenantawin.com/copma/XTnZii02vfgV'. This script likely downloads and executes a second-stage payload.

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` `a14588714140a497ad5a603bf891e2ad61887c22b5ac9e1e6a766eb55afa1714`	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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