Emotet Office (OOXML) / .XLSX malware analysis — malicious · 8f07ba11807915e0

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: af049a0d817196f7c461f6749f121f1c SHA-1: c2f70dda641b39ec7b980cc42e039706421418c4 SHA-256: 8f07ba11807915e0ef1b25065b332c0da1dcac8ea06d4abbf4cd4efcd40d9b49

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with a signature indicating it is an Emotet downloader. Heuristics confirm the presence of a Workbook_Open macro and CreateObject calls, typical for macro-based malware. The embedded VBA script attempts to create batch and VBScript files, and the extensive string concatenation within the script reveals multiple URLs that are likely used to download and execute a second-stage payload. The reconstructed URL is "http://sumedahonline.com/wp-content/HyzNXJ30XQEVcBS RH/ ,http://divachintex.com/wp-inculdades/WHwWRs8KvNzFm6/,http://hotelalandmalabol.com/1520/bUdhEPdf/,http://shwenantawin.com/copma/XTnZiI02vfg".

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` `f42ed207a4b05020f7525ae9d7f43711c837f3beea754179bb4d06212167c437`	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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