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

Static analysis result for SHA-256 584f6fdf30ae3835…

MALICIOUS

Office (OLE) / .XLS

200.0 KB Created: 2020-10-19 23:28:19 Authoring application: Microsoft Excel
MD5: 6471c00af54019d38d0db6026a101704 SHA-1: 3d84339ab662f6b849952e6d91ca4921baee82b2 SHA-256: 584f6fdf30ae38359a0b482894a6cbd6ad117c32f10c173057bb57dd66f920f6
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel 4.0 macro sheet that is encrypted, as indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The OLE_XLM_AUTOOPEN heuristic further confirms the presence of XLM macros. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific intent. However, the presence of encrypted XLM macros strongly suggests malicious activity, likely for code execution or payload delivery.

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.