Emotet Office (OOXML) / .XLSX malware analysis — malicious · b605afe5184030fe

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 6aff3780f50bcdc53b5251c005adf9bb SHA-1: 43f51f1b215b724af3776fea775bd4a6a873bc0a SHA-256: b605afe5184030fe07f4148c645d1264dffcc302bc6476d4c526574776fbf17d

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The file is detected as Emotet by ClamAV and contains a Workbook_Open macro that executes obfuscated PowerShell commands. The script reconstructs a complex PowerShell command that downloads and executes a second-stage payload from multiple URLs. The reconstructed command includes the following URLs: "http://harperhouseproducts.com/Merchandise2/ARSf1LIcOauh1rDiRh/", "http://holubivde.com/eln-images/zqqgz0YXapiWbF/", "http://magicblob.tatamotors.com/wp-includes/7faN9/", "http://chastongrodiotski.com/eln-images/skSsC", "https://seacupps.com/cgi/qRe8rRAG2HDNOOG1/", "http://soqantiqeus.com/cgi/9ii/", "https://greenlawnirrigations.net/GLI_New/JRlt3mOiiezo/", and "https://on-lineinventures.net/cgi/9ii/". It also attempts to write to and execute files at "c:\programdata\yhjlswle.vbs" and "c:\programdata\ughldskbhn.bat".

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` `086e7217b83491c5645f8eca87528d9ca02450fa766f5d53ad8e23e104d0adc9`	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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