Office (OLE) / .XLSX malware analysis — malicious · 3c19a206d7e71417

MALICIOUS

Office (OLE) / .XLSX

332.0 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel

MD5: dfd832ef174f8cead617d777ddcc7d24 SHA-1: ce73a8c48d90d989bd7229363a0188efce991b20 SHA-256: 3c19a206d7e7141714889301a78a3a769451bddff69a8f4b78ec6acb85ef5d89

160 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1204.002 Malicious File

The file contains Excel 4.0 macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN heuristics. The SC_STR_SHELLEXEC heuristic and the presence of 'ShellExecute' in the document body suggest that the macro attempts to execute an external command. This is further supported by the embedded URL, which is likely used to download a secondary payload. The ClamAV detection also confirms the malicious nature of the file.

Heuristics 5

ClamAV: Doc.Downloader.Docusign0521-9864805-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Docusign0521-9864805-0
Reference to ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
XLM Auto_Open with dangerous formula APIs high OLE_XLM_DANGEROUS_FN

Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN

Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL https://googleresult.in/ds/151120.gif�

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`xlm_macros.txt` `4d5531650e0faf8764ddd7b14e6947143c32308cbf699d36f8845764b3b4560a`	xlm-macro	oletools.olevba.extract_all_macros (XLM macro listing)	5603 bytes

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