Emotet Office (OOXML) / .XLSX malware analysis — malicious · 4707ad5d3716cc9c

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: f55eec19e963bb9a0c32076fb81962f8 SHA-1: cfa3abc4ad4b2c77bc0691f63579a1b21d9baadf SHA-256: 4707ad5d3716cc9c634ea5872996ec8ca7d3c21eecd19966a1c095ae835008ef

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetRed02221-9938910-0', strongly suggesting the Emotet family. The presence of a Workbook_Open macro indicates an automatic execution upon opening the document. The VBA script within the document attempts to download and execute a second-stage payload from multiple URLs, including reconstructed URLs like 'http://harperhouseproducts.com/Merch2/ARSf1LIcOauhH1rDiH/'. It also attempts to write a VBS file to 'c:\programdata\yhjlswle.vbs' and a batch file to 'c:\programdata\ughldskbhn.bat', likely for execution and persistence.

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` `780e699b6f8998a783661185eef69a202ba29982cfc9727d412cc85de793417b`	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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