Emotet Office (OOXML) / .XLSX malware analysis — malicious · e15030896597e549

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: e0a39a912faa74410beb2e1da6bb0cb8 SHA-1: d6c19c772fd0a87fd9a06e5153e779bf295006df SHA-256: e15030896597e54977453d6a86b2ba5d97008f0d3620057d2dfd71a37e106e18

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetRed02221-9938910-0'. Static analysis revealed a Workbook_Open macro and a CreateObject call, indicating automated execution upon opening. The document body contains obfuscated commands that reconstruct to a series of URLs and commands for downloading and executing a VBScript payload from 'http://harperhouseproducts.com/Merchandise2/ARSf1LIcOauhH1rDiH/' and saving it as 'c:\programdata\yhjlswle.vbs', followed by execution via a batch file 'c:\programdata\ughldskbhn.bat'. This behavior is consistent with Emotet's typical download-and-execute functionality.

Heuristics 5

ClamAV: Xls.Downloader.EmotetRed02221-9938910-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetRed02221-9938910-0
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` `de7bcbc45ff0a77d05d9af662bacc316e71be11a980e94f6673e556a5dd9d1bc`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	12808 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` `a4d03cd9234971d9f2a1993c4b042b9640072b6ae63190de865c8aebfaf88a5e`	vba-project	OOXML VBA project: xl/vbaProject.bin	37888 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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