Emotet Office (OOXML) / .XLSX malware analysis — malicious · f40ab3527b3a3670

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 16d4ca428287baeec24ea4a0a8ce0f06 SHA-1: 3e96825a91a8fe7cc0e861bef16a175759efadb0 SHA-256: f40ab3527b3a36704d8d64a02f9749e29f57e7a8aa6011a66fb2ee96c3b16503

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetExcel02223-9938902-0', indicating a downloader functionality. The presence of a Workbook_Open macro and CreateObject calls strongly suggests automated execution upon opening. The obfuscated DOC BODY content reveals commands that construct and execute a batch file and a VBScript, likely to download and run a second-stage payload. The reconstructed URL from the obfuscated command is 'http://sumedahonline.com/wp-content/HyzNXJ30XQVBSRH/,http://divachintexile.com/wp-incudades/WWhWRKs8KvNzNFm6/,http://hotelalandmabalo.com/1520/bUdhoEPdf/,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` `077539a8da8bcdb983dba89341c5afdce3d0c74a2f285e58f8fe7c7a18739808`	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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