Emotet Office (OOXML) / .XLSX malware analysis — malicious · ae7d127e60f82622

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 0e6e390b0203fbd92955825a5b50f744 SHA-1: 2b477ff74334ee24a8c966389c91280ce572151f SHA-256: ae7d127e60f826221b4e4bb7e33deb212327c0dd0218a9d78f93439e22f4950c

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The file is an Excel spreadsheet containing a Workbook_Open macro, a common delivery mechanism for Emotet. The macro utilizes CreateObject to execute a batch file named 'jledshf.bat' located in 'c:\programdata\'. Additionally, it attempts to create and execute a VBScript file named 'tghklsd.vbs' in the same directory. The embedded script also contains multiple URLs that are likely used to download additional payloads. The ClamAV detection name 'Xls.Downloader.EmotetExcel02223-9938902-0' further supports the Emotet family attribution.

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` `61ef3ff23eeeaa3a4abb03923263adb3299154541e23d613152695a537cff0b1`	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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