Emotet Office (OLE) / .XLSX malware analysis — malicious · b3a3a1f92be99296

MALICIOUS

Office (OLE) / .XLSX

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

MD5: ffb6a3b0aada37cad327c3819cdb9240 SHA-1: 2e9d059f68413b407d52dd1be29420696052c2a5 SHA-256: b3a3a1f92be99296f26afa4d886bc8212757948b2fae40ee2b35923f06ad3fdf

280 Risk Score

Malware Insights

Emotet · confidence 95%

MITRE ATT&CK

T1059.005 Visual Basic T1105 Ingress Tool Transfer

The critical ClamAV detection and high-severity heuristics for VBA macros, Workbook_Open execution, and CreateObject calls strongly indicate a malicious downloader. The VBA script attempts to download a second-stage payload using a series of hardcoded URLs, including reconstructed values such as 'http://mytelefoniists.de/wp-content/bL8fXv2wM/QupHdL23HMg/' and 'https://www.yeald.finance/wp-content/uploads/jqAorV8zquhL23HMg/'. The script also references 'wscript.exe' and a path 'c:\programdata\', suggesting execution and potential staging of downloaded content.

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` `d6216b1540c6d866e0cdc66ed3bfa2b79b477655c56d42a698e7b407351a97e3`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	6560 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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