Emotet Office (OOXML) / .XLSX malware analysis — malicious · c5c4608078bfe104

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: d1ed13c32ac25c45a1c855685ed72a5c SHA-1: 639e652f8d139019e750bba21949a971ef251dfc SHA-256: c5c4608078bfe1044aaa79bfc64b1e584a7a48fc0378fe3c65ee12cef4726561

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1059.005 Visual Basic

The sample is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetExcel02223-9938902-0, strongly suggesting the Emotet family. The presence of a Workbook_Open macro and CreateObject calls indicates automated execution upon opening. The embedded VBA script contains obfuscated PowerShell commands, including a reconstructed URL: 'http://sumedahonline.com/wp-content/HyzNXJ30XQEVcBSRH/, http://divachintex.com/wp-inculdades/WWhWRs8KvNzFm6/, http://hotelanalmalabol.com/1520/bUdHEpdY/, http://shwenantawin.com/copma/XTnZJii02vfg', which are likely used to download and execute a second-stage payload. Additionally, it attempts to drop and execute files named 'jledshf.bat' and 'tghklsd.vbs' in the 'c:\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` `77c240226dd4ff2c7d43163b9ad808f5aef7d730bf6ed9dd7a576e20ea00d695`	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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