Emotet Office (OOXML) / .XLSX malware analysis — malicious · b6cc90f830ea5f5e

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 0f8804786712450dcb6d2d1f453a53f3 SHA-1: abcd7d90ac6e1d716763c26ac6380be4453b6cbf SHA-256: b6cc90f830ea5f5e57ebdc499823a296a8df5ba9154f181113067fe5301427ae

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and contains a Workbook_Open macro, indicating an automated execution upon opening. The embedded VBA script, while heavily obfuscated, attempts to execute a batch file located at 'c:\programdata\jledshf.bat' and a VBScript at 'c:\programdata\tghklsd.vbs'. The obfuscated PowerShell command within the DOC BODY suggests the download and execution of a second-stage payload from multiple URLs, including 'http://sumedhaonline.com/wp-content/HyzNXJ30XQEVcBS RH/'.

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` `90c2a0f5019e2fbccea6525d629450adbfc9ce4b9429d0e65d16ab2f9843e611`	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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