Emotet Office (OOXML) / .XLSX malware analysis — malicious · d4aaa0a373b670de

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 402337f66398bae14555c619cfc62ba3 SHA-1: d252815b1e6e4a90e2bd7d09198e8cc760a99785 SHA-256: d4aaa0a373b670de2d6ee853a437035dda354cd9523de58ec7ada291e87ad9dc

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and high-severity heuristics for Workbook_Open macros and CreateObject calls strongly indicate malicious intent. The embedded VBA script, while partially obfuscated, contains PowerShell commands that attempt to download and execute a second-stage payload from multiple URLs. Specifically, the script reconstructs a PowerShell command that includes the following download URLs: "http://sumedhaonline.com/wp-content/HyzNXJ30XQFEVBcBRH/ ", "http://divachintax.com/wp-inculdes/WWhWRks8KvzzNFm6/", "http://hotelalandmalabol.com/1520/bUdhEpdY/", and "http://shwenantawin.com/copma/XTnZii02vfg". The script also references batch and VBScript files in the programdata directory, likely for execution or staging.

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` `666b57cae1ce870b6427250ff5f774654106782e57aa82d4f600698605e2cb7c`	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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