Emotet Office (OLE) / .XLSX malware analysis — malicious · de01bf8d43aa0cfa

MALICIOUS

Office (OLE) / .XLSX

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

MD5: fcbefd54a8a5b736ba5e334a6711f205 SHA-1: 687ca7dae52705b254b08b87082b0605a4f381a0 SHA-256: de01bf8d43aa0cfae4320ceca546a8e17b8bc2cad5188fb0fa947186f2ce1dc4

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

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

The critical ClamAV detection and multiple high-severity heuristics, including OLE_VBA_PCODE_AUTOEXEC_EXEC and OLE_VBA_WBOPEN, indicate malicious VBA macros. The Workbook_Open event is triggered upon opening the document, and the script attempts to download and execute a second-stage payload from multiple URLs. Specifically, the script constructs a command that includes the reconstructed URL 'http://four.renovatio.lt/wp-includes/KGzoB0zsrKzjqEj/' and attempts to execute it. The presence of Wscript.Shell and CreateObject calls further supports this malicious intent.

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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