Emotet Office (OOXML) / .XLSX malware analysis — malicious · 92626c4b47e0333d

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 05bd35127b540d369883d8d70e8dc964 SHA-1: e5b0b56bd0c73985c17e3844f05c92a16e85a8fe SHA-256: 92626c4b47e0333dae0332f09ad8baa741a516b7ded995cb07382ac1701e6402

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 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 heavily obfuscated PowerShell commands that reconstruct multiple URLs, including 'http://sumedahoonlin.com/wp-content/hyzNXJ30XQEVcBRH/', 'http://divachintextiles.com/wp-inculdes/WWHWRKs8KvNzN6m/', 'http://hotelalandmalabol.com/1520/bUdhEpdf/', and 'http://shwenantawin.com/copma/XTnZJi02vfgV', which are likely used to download and execute a secondary payload. Additionally, it attempts to create batch and VBScript files 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` `19a968a0572160cdf7a6e7157eef6985bb3707861103e2406d1c30e5b7cccc4b`	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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