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

Static analysis result for SHA-256 75de7712c3817911…

MALICIOUS

Office (OLE) / .XLS

199.5 KB Created: 2006-09-16 00:00:00 Authoring application: Microsoft Excel
MD5: add386c35e2abd1d17bb776a7a69e2d0 SHA-1: 5aa83ebd66a6848cf368149fb01f520852d7f8ec SHA-256: 75de7712c3817911df0973c769c348f24593b996b513c1550260626e69a8a99d
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The file is an Excel 4.0 macro sheet that is encrypted, preventing detailed analysis of its contents. Heuristics indicate the presence of an auto-open macro, suggesting it attempts to execute code upon opening. The encrypted nature and macro sheet structure point towards a downloader or initial execution stage.

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.