Emotet Office (OLE) / .XLSX malware analysis — malicious · 8daf0ebdddeb8411

MALICIOUS

Office (OLE) / .XLSX

129.5 KB Created: 2015-06-05 18:17:20 Authoring application: Microsoft Excel

MD5: bd3c4ca0b433863d629449f57a1763aa SHA-1: 928181717638c9fa66c8395a57c5802e54ed4f64 SHA-256: 8daf0ebdddeb841195bf764c5b826b10a41c4fb5e74ed3cb0ba53653cb3c0d0a

280 Risk Score

Malware Insights

Emotet · confidence 90%

MITRE ATT&CK

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

The sample contains a Workbook_Open VBA macro that utilizes Wscript.Shell to create and execute a batch file. The macro also attempts to download a payload from a reconstructed URL: "http://santoetortilla.com/_baks/tUX9/,http://donbaham.com/Home_files/YS0PazYqeraes/,http://barnhart-studios.com/eln-images/Vggh1ng/,http://blute.com/3dtech/jLu8IANnj3gK9Wc/,http://zenzebra.net/plath/9Q0DBLE/,http://reacour.net/PhotoGallery/UwRHcceSGbaCeGF/,http://miniflam.com/eln-images/fSwbQjUUMAfGgdw/,http://marezedecor.com/MarezAgallery/SEQxWtpMJ7cA8rAtY/http://w.com/eln-images/u0vT/". This indicates a downloader functionality, consistent with Emotet's typical behavior of fetching and executing further stages.

Heuristics 7

ClamAV: Doc.Downloader.EmotetRed02220-9938909-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetRed02220-9938909-0
Reference to Windows Script Host high SC_STR_WSCRIPT

Reference to Windows Script Host
Workbook_Open macro high OLE_VBA_WBOPEN

Workbook_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
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 macros detected medium OLE_VBA_MACROS

Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7a075e02dc1e88807280b9b84946715e79a3c091d50391301434649c77b78ea1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	12808 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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