Emotet Office (OOXML) / .XLSX malware analysis — malicious · c30319c86d429bd8

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 5a4dbd54b91ee4cbd8e731ad5173ea22 SHA-1: 0c8eae127ba1a07ff60d21357794e00a4682101f SHA-256: c30319c86d429bd854c238d03187958551a0aae49cc0be9cd0abca5e62400746

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV with a signature indicating it's an Emotet downloader. The presence of a Workbook_Open macro and CreateObject calls, along with the embedded VBA script, strongly suggests malicious intent. The VBA script constructs and executes obfuscated PowerShell commands, which are designed to download and run a second-stage payload from multiple URLs. The script reconstructs the following URLs: "http://sumedhaonline.com/wp-content/HyzNXJ30XQVBSRH/", "http://divachintextiles.com/wp-incudades/WHwWRKs8KvzNFm6/", "http://hotelalandmalabole.com/1520/bUdhEPdf/", and "http://shwenantawin.com/copma/XTnZJi02vfgV". It also defines paths for temporary batch and VBScript files: '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` `7dcd18d4ca1820c83c3ba80d359549508af71bd24d28f547e51fde80b7f31e9c`	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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