Emotet Office (OOXML) / .XLSX malware analysis — malicious · 3154dc45218c972f

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: f2650ef130bb6530e53cf2aec74f6b7e SHA-1: 4d1dfe569638023c2715f67945df6af635cd996c SHA-256: 3154dc45218c972f964c27c649814ec9faa320eb7b5a3ef0559b4fa86c0e2149

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.003 Windows Command Shell

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetRed02221-9938910-0'. The presence of a Workbook_Open macro and a CreateObject call strongly suggests malicious intent. The DOC BODY contains obfuscated commands that, when decoded, reveal the use of 'Wscript.Shell' to execute a VBScript from 'c:\programdata\yhjlswle.vbs' and a batch file from 'c:\programdata\ughldskbhn.bat'. The VBA script itself is designed to create charts and potentially export them, but the primary malicious functionality is driven by the shell execution and the downloaded payloads from the listed URLs.

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` `379e7df2fa96130a2c5afedd28b24bd412109c6eeb539d6c65c2370f4aba6a9c`	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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