Emotet Office (OLE) / .XLSX malware analysis — malicious · e2861910ab755ae0

MALICIOUS

Office (OLE) / .XLSX

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

MD5: b48ee1252c7f6dbb03b26773fd59977a SHA-1: b9c84ffb257424db6026d20cea3ccfeb8e7e2c82 SHA-256: e2861910ab755ae041835f3fa7f4835fe901300029444c1163426fab82a49c25

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1105 Ingress Tool Transfer

The file contains VBA macros, specifically a Workbook_Open auto-execution routine, which is a common delivery mechanism for Emotet. The macros utilize CreateObject to instantiate Wscript.Shell, enabling the execution of commands. The document body and script content reveal attempts to download and execute files from multiple URLs, including reconstructed URLs like 'http://santoetortilla.com/_baks/tUX9/http://donbaham.com/Home_files/YS0PAPzYeraes/,http://barnhart-studies.com/eln-images/vggh1ng/ ,http://blut.com/3tech/jLu8IAnnj3gK9WC/,http://zenzebra.net/plath/9Q0DBLE/,http://realacorp.net/PhotoGallery/Uw mRHceSGbaCeGF/,http://miniflam.com/eln-images/fSwbQjU M AfGxdw/,http://marezdecor.com/MarezAallery/sEQxW TpMJ7A8rAtY/D/'. It also attempts to write suspicious VBS and BAT files to the 'c:\programdata\' directory. The ClamAV signature further supports the Emotet family attribution.

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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