Emotet Office (OOXML) / .XLSX malware analysis — malicious · b1e64dea97cea814

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: c5d2757e6ba750c335824a010a0ce2af SHA-1: 364f036d2c3d0014b76da7331288f823300a2cec SHA-256: b1e64dea97cea814db1cbdf3fdc39dc0cd6dcd40c44b42f67811dbba5d553ee3

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for Workbook_Open macros and CreateObject calls indicate malicious intent. The embedded VBA script, specifically the `FHsdrghkldsSeErhoihsw` subroutine, attempts to download a second-stage payload from multiple URLs. The script reconstructs a PowerShell command that includes the following URLs: 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/', 'http://divachintextile.com/wp-incudades/WWHWRKs8KvNm6/', 'http://hotelalandmalo.com/1520/bUdhEPdf/', and 'http://shwenantawin.com/copma/XTnZJii02vfg'. It also attempts to write a batch file to 'c:\programdata\jledshf.bat' and a VBScript to 'c:\programdata\tghklsd.vbs'.

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` `09032d7ebe9f8af3f03c78deabdbe65cb338196bda41a8203a0be64ca3a493b2`	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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