Emotet Office (OOXML) / .XLSX malware analysis — malicious · ecd1263e1a20ea63

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: ee40070d0de65383adb353151fa1a05d SHA-1: a3e245ae2a0efd1307e835c8e1211008440fa045 SHA-256: ecd1263e1a20ea637bd297ed33382a9746e269215d489b6f606e7a879c8d9988

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. Static analysis revealed a Workbook_Open macro, indicating automatic execution upon opening. The VBA script within the document attempts to create and execute batch and VBScript files, specifically 'c:\programdata\jledshf.bat' and 'c:\programdata\tghklsd.vbs'. The script also contains a long, obfuscated string that appears to be a list of URLs, likely for downloading a second-stage payload. The presence of these elements strongly suggests a downloader functionality.

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` `f7a50d4ef42d0d33f2d265fa4c54ee8280a7cca1e1398921936d79317e644a40`	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.

Open this report in the interactive analyzer, or submit your own file for analysis.