Emotet Office (OOXML) / .XLSX malware analysis — malicious · 7bb6dc926a5f2e22

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: c85f2f6ac51f24e487297d1963a1dcec SHA-1: 511a55a5602d0d448987a93ace082610adf63b62 SHA-256: 7bb6dc926a5f2e222ba863d37494caef4f2c0de375ab84673ce21d51f5ffa13f

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell 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 DOC BODY reveals obfuscated commands that construct and execute a batch file located at 'c:\programdata\jledshf.bat' and a VBScript at 'c:\programdata\tghklsd.vbs'. The embedded VBA script further supports this by showing the construction of these paths and the execution of commands. The obfuscated PowerShell command within the DOC BODY attempts to download payloads from multiple URLs, including 'http://sumedahonline.com/wp-content/HyzNXJ30XQEVcBS RH/'.

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` `847507a412dcde1b73c296375649cfa448fd7d13b6feae2b0965b9ed2b1e7cb4`	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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