Emotet Office (OLE) / .XLSX malware analysis — malicious · e7a67a1eca29ecf8

MALICIOUS

Office (OLE) / .XLSX

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

MD5: af839c708bd09abc94d7ce925664ad5c SHA-1: 22d675d255c3e56410d856c0774ae4dc62851f70 SHA-256: e7a67a1eca29ecf82c72368237d59f22dcb5824ea73b0bc903ab0b8782d6045a

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The file contains a Workbook_Open VBA macro that uses Wscript.Shell to execute a batch file located at 'c:\programdata\jledshf.bat'. The macro also attempts to download and execute a DLL from a series of concatenated URLs, which are reconstructed as 'http://monequuot.ja.deal.com/assets/jcWxvUSPE7VhWxJ/http://vestaseguridab.com.ar/wp-content/7JD9gufnwG/,https://mail.rededucacionvirtual.com/wp-incledes/BqJi1K/,http://veluxcucumberapivaves.oribitalwave.it/assets/W9Kfk84'. This behavior is characteristic of Emotet downloaders, which are designed to fetch and execute further stages of malware. The ClamAV detection ID further supports this attribution.

Heuristics 7

ClamAV: Doc.Downloader.EmotetExcel02226-9938630-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.EmotetExcel02226-9938630-0
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` `c49f2df77c50e10269216d97c3efdf7c32f9f18ba5d8fd42a9b144f48e100040`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	5709 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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