Emotet Office (OOXML) / .XLSX malware analysis — malicious · 391545c5353da78d

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 5ed015a3374359e35e8179e3681be331 SHA-1: eafadc437182c5d49de5b8cecddd0e2490af3806 SHA-256: 391545c5353da78d4073dd76fbef08076f1e49df9b231cd772ffbc21e0292483

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, indicating it's a known Emotet downloader variant. The presence of a Workbook_Open macro and CreateObject calls strongly suggests malicious VBA code execution. The embedded script attempts to download and execute payloads from multiple URLs, including reconstructed URLs like 'http://sumedahonline.com/wp-content/HyzNXJ30XQEVcBRH/', 'http://divachintexile.com/wp-includes/WBhWRKs8KvNzNfM/', 'http://hotelalandmala.com/1520/bUdhEpdf/', and 'http://shwenantawin.com/copma/XTnZJi02vfg'. It also creates batch and VBScript files in the programdata directory.

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` `36be6d086089cd4d1f6df0a2437f0d98112b971232845ad727876612d8b0f6de`	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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