Emotet Office (OOXML) / .XLSX malware analysis — malicious · 88b225f9e803e250

MALICIOUS

Office (OOXML) / .XLSX

46.5 KB Created: 2006-09-28 05:33:49 UTC Authoring application: Microsoft Excel 12.0000

MD5: eb896ff0f37bfd40849a2a5feb40f01d SHA-1: d1fd6bf9e26f948ad84e441bb53b3a6d63017491 SHA-256: 88b225f9e803e2509cc2b83c57ccd6ca8b6660448a75b125e02f0ac32f6aadb9

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell

The file is an Excel document containing VBA macros, specifically a Workbook_Open macro, which is a common delivery mechanism for Emotet. The extracted script contains obfuscated code that attempts to download a payload from the URL "http://visteme.mxx/shop/wp-ad". This script is designed to execute a second-stage payload, characteristic of Emotet's downloader functionality.

Heuristics 5

ClamAV: Xls.Downloader.EmotetExcel112100-9910690-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetExcel112100-9910690-0
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` `8163168ccf1004e30fe18e0c3086df394975e779412ef3061e4007da68b2887d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	4962 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` `143e33ba03f2ce1ca57cee41e788e9b5e7c03b97e488ef8a229d21b5209afdf1`	vba-project	OOXML VBA project: xl/vbaProject.bin	24576 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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