Emotet Office (OOXML) / .XLSX malware analysis — malicious · f01e7ab57ba6074a

MALICIOUS

Office (OOXML) / .XLSX

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

MD5: 6bd881c66f0c5d3344c901cbb4949139 SHA-1: 7da3e899bde8d2a80aa32d4a57c62345e8ef7bee SHA-256: f01e7ab57ba6074a6a11aad0b84fa6cbc2d2fb746d41594d76b71343f933b267

200 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.003 Windows Command Shell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is identified as malicious by ClamAV with the signature 'Xls.Downloader.EmotetRed02221-9938910-0', strongly suggesting the Emotet family. The Workbook_Open macro and CreateObject firings indicate automated execution upon opening. The document body contains heavily obfuscated commands that, when deobfuscated, reveal multiple URLs and the intent to download and execute a second-stage payload via `wscript.shell` and `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` `7bb9840ec98145ba735e7515d479206e0e956c84f166e2a8d26534fa4ac69d0a`	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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