Emotet Office (OLE) / .XLSX malware analysis — malicious · ec6b02df5286148c

MALICIOUS

Office (OLE) / .XLSX

144.0 KB Created: 2006-09-28 05:33:49 Authoring application: Microsoft Excel

MD5: 88349ab70b32352d9aa09f80ab01ef62 SHA-1: 2ea5e8a0f1cf652bd2b7b1e903e320510dd19bf6 SHA-256: ec6b02df5286148c50da19bf615d01f57d9d85f45d6c403fc02c17034d21d97b

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File T1105 Ingress Tool Transfer

The file is a macro-enabled Excel document detected as Emotet by ClamAV. The Workbook_Open macro executes a series of commands that appear to download and execute a second-stage payload. Specifically, it constructs a command line using `CreateObject("Wscript.Shell")` and `echo` commands to download files from multiple URLs, including `http://altherlyplane.com/wp-admin/ELwA8YcOqJn/`, to `c:\programdata\cbjwektde.bat` and then execute it. The VBA script also contains obfuscated strings that reconstruct URLs and file paths, indicating a downloader functionality.

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` `022b6ea87e671715cd07f596eceb5d45e85534a367868a0e820c8aa5cb013822`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6734 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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