Emotet Office (OOXML) / .XLSX malware analysis — malicious · 41ab48e0bfd1932a

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: fa2fa01c4e1b06fa0bf2eba1c279dcfa SHA-1: ec411fe69b77e99a5f378521b6cdfcbe6ad21730 SHA-256: 41ab48e0bfd1932a816e21bcc2b6173c9f121a0de35db5783defad275842f52e

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetExcel02223-9938902-0. The presence of a Workbook_Open macro and CreateObject calls indicates that the macro is designed to execute automatically upon opening the document. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://sumedhaonline.com/wp-conten/HyzNXJ30XQVBSRH/', and writes batch and VBScript files to disk.

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` `2afc71f2e31ee657ac7a2305c83d15b1a826846c67d565cf7d6e7783ab646c22`	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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