Malicious Office (OLE) / .XLS — malware analysis report

Static analysis result for SHA-256 c6d2905ab73ac56e…

MALICIOUS

Office (OLE) / .XLS

404.5 KB Created: 2020-11-18 22:00:31 Authoring application: Microsoft Excel
MD5: fc6b65df2045577c2ebe213e9fb519c2 SHA-1: f609f1769ad094fb3c670a6ac7f35d6524a889f9 SHA-256: c6d2905ab73ac56ef9d7baa9ec840c21e9a60b7ce579ea13e3641c841abdfbcd
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an encrypted Excel 4.0 macro sheet, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an auto-open macro (OLE_XLM_AUTOOPEN) suggests it is designed to execute automatically upon opening. Without a document body or script content, the exact payload and delivery mechanism remain unclear, but the structure points to a malicious macro-based execution.

Heuristics 2

  • Encrypted Excel 4.0 macro sheet high OLE_XLM_ENCRYPTED_MACROSHEET
    Workbook contains an Excel 4.0 macro sheet and BIFF FILEPASS encryption. Password-protected XLM macro sheets, especially the default Excel password path, are a common malware evasion pattern because static formula extraction may fail until the workbook is decrypted.
  • 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.

Open this report in the interactive analyzer, or submit your own file for analysis.