Emotet Office (OOXML) / .XLSX malware analysis — malicious · 32d9a0b6c7b9bcb0

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 7aba88e64566ec114b3f3d616766a06b SHA-1: 9298eb71430946b804a015fe77f4af773b838095 SHA-256: 32d9a0b6c7b9bcb07600e9566a80b4e4a434eefe58ee9d5e3157b165c9c1849b

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 an Excel file containing a Workbook_Open macro, which is a common delivery mechanism for Emotet. The VBA script is heavily obfuscated but appears to construct and execute a batch file located at 'c:\programdata\jledshf.bat' and a VBScript at 'c:\programdata\tghklsd.vbs'. The script also attempts to download payloads from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/', 'http://divachintextiles.com/wp-incledes/WBhWRKs8KvNzNFm6/', 'http://hotelalandmalabO.com/1520/bUdhEpdf/', and 'http://shwenantawin.com/copma/XTnZii02vfgV'. The ClamAV detection name further supports the Emotet family attribution.

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` `10ea4e2e12c244bdb58c7127591a7ff9f256e288c5c831aac5491250fec77b63`	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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