Emotet Office (OOXML) / .XLSX malware analysis — malicious · af5501f682d17bc7

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 378840180700c76faed39cc2d7b090ce SHA-1: e2c882684b38a76e4201f76408ca781bb2f17250 SHA-256: af5501f682d17bc74a7833e7559baf83e8abbdf43d9e7006342c9320a5c86d2b

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 detected as Emotet by ClamAV. The Workbook_Open macro is present, indicating automatic execution upon opening. The script attempts to download a second-stage payload from multiple URLs, including 'http://sumedaanlinl.com/wp-content/hYnNXJ30XQEVcBSHR/', and save it as 'c:\programdata\jledshf.bat'. It also attempts to execute a VBScript from 'c:\programdata\tghklsd.vbs'. The script also contains a long, obfuscated string that appears to be a list of URLs for downloading payloads.

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` `68ea9f7db507eaca710ea9ac8f6da169897cadd7a30505c4959d5e9d326903e5`	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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