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

Static analysis result for SHA-256 c77accaaf1478a94…

MALICIOUS

Office (OLE) / .XLS

298.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: 560b15f5ee229cdf819c9915c881db04 SHA-1: 176ae2a41fb738f665dd7bcfaeea53a90b764997 SHA-256: c77accaaf1478a943b4cd1db36092f10c6809b1cfd54cdd1d580dbebfe35485e
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 OLE_XLM_AUTOOPEN heuristic suggests that macros are configured to run automatically upon opening. While no specific URLs or scripts were extracted, the encrypted nature and macro sheet structure strongly suggest a malicious intent to execute arbitrary code or download further stages.

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.