Emotet Office (OOXML) / .XLSX malware analysis — malicious · 1ab1089823e90eec

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 480e91d38e45757b93c249c45403863b SHA-1: 1549508c90ab556c1556666e71a7f8fb2998970f SHA-256: 1ab1089823e90eecf02c01078155efa1ff6c4674f0356887dbf68e1b75c4eaf7

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Service Execution: Visual Basic T1059.003 Command and Scripting Interpreter: Windows Command Shell T1204.002 Malicious Link: Malicious File T1105 Ingress Tool Transfer

The file contains a Workbook_Open macro that uses CreateObject to instantiate Wscript.Shell. This object is then used to execute a batch file, 'c:\programdata\ughldskbhn.bat', which in turn is designed to download and execute a Visual Basic script, 'c:\programdata\yhjlswle.vbs'. The VBA code also contains multiple URLs that are likely used to fetch the malicious payload. The ClamAV detection name 'Xls.Downloader.EmotetRed02221-9938910-0' strongly suggests the Emotet family.

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` `771147fe88ca1a5b87ac213b099b85209c0e5b12750d1a126b4add35dd44e5e1`	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.

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