Emotet Office (OOXML) / .XLSX malware analysis — malicious · e33bfb2bd69f99fa

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: a8c03af1c836bb6f0f6e6f5e8f26ccfa SHA-1: 4768c7be08f682ed7e3b56bd3b00aae9e23890a3 SHA-256: e33bfb2bd69f99fabf0267e9d1270aa775a01ce98d162554775fe524bafa9d70

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File

The critical ClamAV heuristic and high-severity VBA heuristics indicate this XLSX file contains malicious macros. The Workbook_Open macro is designed to execute a series of commands that download and run a VBScript payload from multiple URLs. The reconstructed URL 'http://harperhousseproducts.com/Merchandise2/ARSf1LIcOauh1rDiH/' is a primary indicator of this malicious activity. The script also attempts to save the downloaded payload to 'c:\programdata\yhjlswle.vbs' and execute it via a batch file.

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` `d3934b398ff05a2dcee5c8b7051d3bb48d63984e27cb20eb76d9aebbfd1c92ab`	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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