Emotet Office (OOXML) / .XLSX malware analysis — malicious · 32dda8cd25e800a1

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: f013d297cfd97750f56ef48328f1709b SHA-1: 1045e40a928808a6c5a4b350ebbb4fd53c496e51 SHA-256: 32dda8cd25e800a1a698a2765c6e63d0c4f8301c56bee90a1234664004d80fe3

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 an Excel document containing a Workbook_Open macro, which is a common delivery mechanism for Emotet. The macro uses CreateObject to execute a command that downloads and saves a VBS file to 'c:\programdata\tghklsd.vbs' and a batch file to 'c:\programdata\jledshf.bat'. The script also attempts to execute a PowerShell command that downloads a payload from multiple URLs, including 'http://sumedahonline.com/wp-content/hyeNXJ30XQFEVBSRHG/'. The ClamAV detection further confirms its malicious nature as Emotet.

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` `580738705de36d6958e1970201ddff4cec10d9b2aaec65ee7a5702f7f263d492`	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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