Emotet Office (OOXML) / .XLSX malware analysis — malicious · e459c754a3bbddea

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 36fcd7025bdca0ccc96bcca12cad459d SHA-1: 6b6a4008e633b065865f1a1926d0f4d9d101bcec SHA-256: e459c754a3bbddea92d7801cc2866a8d2ec847f604830dabbbf226b7f6d6d292

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 identified as malicious by ClamAV and contains a Workbook_Open macro, indicating automatic execution upon opening. The VBA script within the document attempts to create and execute a batch file named 'jledshf.bat' and a VBScript named 'tghklsd.vbs' in the 'c:\programdata\' directory. The script also contains a heavily obfuscated command that appears to download payloads from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQFEcBSbRH/', 'http://divachintextile.com/wp-inc ludes/WWHwRks8KvNzNfM6/', 'http://hotelalandmalabo.com/1520/bUdhEpdf/', and 'http://shwenantawin.com/copma/XTnZJi02vfg'. This behavior is characteristic of a downloader malware.

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` `3ccbe017a10810b117e055be67247c0f1b2a58fd7a237302f6759bfd01dbe60a`	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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