Emotet Office (OOXML) / .XLSX malware analysis — malicious · f4059763f3d89a96

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: ce9a1c612649f816cfb3883ceb4f55bf SHA-1: a5b69c23d7fb68266e2a93232c91c407e79df6c6 SHA-256: f4059763f3d89a960f0f308f33d00468d4221fde5e044a95f5b3e8491715aefd

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Xls.Downloader.EmotetRed02221-9938910-0, indicating it's likely an Emotet downloader. The Workbook_Open macro and CreateObject heuristic firings confirm the presence and execution of VBA code. The script attempts to download and execute a second-stage payload from multiple URLs, including 'http://harperhouseproducts.com/Merchandise2/ARSf1LIcOauhH1rDiH/', using Wscript.Shell to run 'c:\programdata\yhjlswle.vbs'.

Heuristics 5

ClamAV: Xls.Downloader.EmotetRed02221-9938910-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Xls.Downloader.EmotetRed02221-9938910-0
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` `de7bcbc45ff0a77d05d9af662bacc316e71be11a980e94f6673e556a5dd9d1bc`	vba-macro	oletools.olevba.extract_macros (decoded VBA source from OOXML)	12808 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` `a1cfab5cf164e79d03c8f6a798c6ec7e5c9c51e57a8eff461f0931e0cd084d73`	vba-project	OOXML VBA project: xl/vbaProject.bin	37888 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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