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

Static analysis result for SHA-256 7cea62dcc65e6ea8…

MALICIOUS

Office (OLE) / .XLS

104.5 KB Created: 2020-10-06 03:01:10 Authoring application: Microsoft Excel
MD5: e1e065c2bbcdd1d7552b5b1edf56577c SHA-1: da5caab538bd9f0d60d60f9b6b2ca0a4f04a669f SHA-256: 7cea62dcc65e6ea8a62f1eb52cd8efe270c970a9afe5147782522c69cc10249d
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is identified as 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. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific intent. However, the combination of encryption and auto-executing macros strongly points to a malicious delivery mechanism.

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.