Emotet Office (OOXML) / .XLSX malware analysis — malicious · 449a371155a8ff91

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 4fe378e546adec4e5faa8043708ddbb5 SHA-1: 1d717a2812251f7e6fd0bea179f844ad56516a39 SHA-256: 449a371155a8ff915a33cd4247e576813e98112e44ebcdb187618e39b1109788

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'. The presence of a Workbook_Open macro and CreateObject calls indicates malicious intent. The script attempts to download and execute payloads from multiple URLs, including a reconstructed URL: 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/ ,http://divachintexts.com/wp-inc ludes/WWHWRKs8KvNzFm6/,http://hotelalandmalaabol.com/1520/bUdhEPdf/,http://shwenantawin.com/copma/XTnZJi02vfg'. It also writes two batch/VBScript files to the programdata directory: 'c:\programdata\jledshf.bat' and '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` `7885673895f2da4549b2c6cb3abe4e5fe30d278a0c6616f47b667754bdf30208`	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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