Emotet Office (OOXML) / .XLSX malware analysis — malicious · d5f4e3feceeb560a

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: a5d78a5d3f38e44f03038b7a44a563ea SHA-1: 4e15cadd44037b7e2d088db237d65f92c985ecd5 SHA-256: d5f4e3feceeb560a3e72f12d7bfe5b27186abf1a705f7b4718f4eeb3ae277a5c

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1566.002 Phishing: Spearphishing Attachment T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.005 Command and Scripting Interpreter: Visual Basic T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetExcel02223-9938902-0, indicating it is likely an Emotet variant. The presence of a Workbook_Open macro and CreateObject calls strongly suggests malicious VBA code execution. The macro attempts to create and execute a batch file located at 'c:\programdata\jledshf.bat'. This batch script, in turn, appears to download a second-stage payload from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQFEBCSRH/'.

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` `d1b21f709d20ee98d980ec26cbf4edc60591e2e4aad2c0ac78bd4a0bf7438acf`	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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