Emotet Office (OOXML) / .XLSX malware analysis — malicious · d7800dc3ecf97dce

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: a9e06ae8dab372a6c89fb8436e33374d SHA-1: f1f7c54a3f5b1dbd7e59d9b80cf4335719a58c2c SHA-256: d7800dc3ecf97dce06cd999d79342a8e89da9b66f7b6c54193b496bb2a19e5f3

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1204.002 Malicious File T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetExcel02223-9938902-0', strongly suggesting the Emotet family. It contains a Workbook_Open macro that uses CreateObject to execute a batch file and a VBScript. The script attempts to download payloads from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/', 'http://divachintex.com/wp-inc ludes/WBhWRs8KvzNfM6/', 'http://hotelalandmalaab.com/1520/bUdhpEPdf/', and 'http://shwenantawin.com/copma/XTnZJi02vfgV'. The script also constructs a command line that appears to be a Base64 encoded PowerShell command for downloading and executing further stages.

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` `37b1a60725aba6fcacacfeb5a9540c88807e5cf184a02415615225abe1111ad5`	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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