Emotet Office (OOXML) / .XLSX malware analysis — malicious · 53b1f2e3ebc994b6

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: cede684329ca42bbdd76cb29b413004d SHA-1: 11fc133e1b2f28d98df322f1d30696ef560b742a SHA-256: 53b1f2e3ebc994b6ac1bc6614a444b6396ffec67d9f915cfbaba47e7556b1647

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The ClamAV detection and high-severity heuristics for Workbook_Open macros and CreateObject calls strongly indicate a malicious downloader. The embedded VBA script contains obfuscated PowerShell commands that attempt to download and execute a second-stage payload. Specifically, the script reconstructs the following URLs for payload retrieval: 'http://sumedhaonline.com/wp-content/hyNXJ300XQVBSRH/', 'http://divachintextile.com/wp-incldes/WHwWRKs8KvNzNfM/', 'http://hotelanalmabalo.com/1520/bUdhpEpdy/', and 'http://shwenantawin.com/copma/XTnZJii02vfgV'. It also attempts to write batch and VBScript files to disk: '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` `1be4f3ac77aaa695e9f1b1ad9f24e5800f38aedd0490e9e10d984f7cc338b5b0`	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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