Emotet Office (OOXML) / .XLSX malware analysis — malicious · c2229345c09445ef

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: d5e31b8947fc050d6b453b2538cf7e87 SHA-1: 20f60a703a507dced70db88870811d186d5070a1 SHA-256: c2229345c09445ef13b4529d204a3dcb27334fd4a18fad5a500eb96f185f0f16

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The sample is a macro-enabled Excel file identified by ClamAV as Emotet. The Workbook_Open macro executes a batch script, 'jledshf.bat', which in turn executes a VBScript, 'tghklsd.vbs'. The VBScript contains obfuscated PowerShell commands that download and execute payloads from multiple URLs. The reconstructed URL for the payload download is 'http://sumedhaonline.com/wp-content/HyzNXJ30XQEVcBSbRH/'. The presence of Workbook_Open and CreateObject heuristics, along with the script's behavior, strongly indicates a downloader functionality.

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` `8ebbccc659f0aa71a219549616f8045d8ae888cee7582c44c616902cdef57d53`	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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