Emotet Office (OOXML) / .XLSX malware analysis — malicious · 251a9cbdcac6dc26

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 26ae9a6d52debb0ab9850af84e93acac SHA-1: 0345c72775b06c0c78eaf3e4ad78c9e384427a04 SHA-256: 251a9cbdcac6dc266a54da77eca8d887cc68325a45142abb438fe4667859d9e6

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 identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetExcel02223-9938902-0'. The presence of a Workbook_Open macro and CreateObject calls strongly suggests malicious intent. The VBA script attempts to create and execute batch and VBScript files, and the reconstructed URL 'http://sumedhaonlin.com/wp-content/HyzNXJ30XQEVcBS RH/ ,http://divachintexile.com/wp-inc ludes/WWHWRs8KvNzFm6/,http://hotelamablanca.com/1520/bUdhEpdf/,http://shwenantawin.com/copma/XTnZJii02vfg' indicates a download mechanism for a second-stage payload.

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` `b095d8c54ec5bbac51c7ba0876d8b6c595069586eb2f03b585972d71159a15ea`	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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