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

Static analysis result for SHA-256 1463790facf513c8…

MALICIOUS

Office (OLE) / .XLS

123.0 KB Created: 2020-07-01 09:47:51 Authoring application: Microsoft Excel
MD5: ac6e65dc7302c64a982e48e9d9691ab5 SHA-1: 12de99d9f4efcac12d31d2a99607e4fde720ef4f SHA-256: 1463790facf513c8798815818a62d7decc55d535fc90189d6e4c0e8dd052d119
120 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. ClamAV detection as 'Xls.Dropper.Agent-8803157-0' strongly suggests its purpose is to drop and execute a secondary payload. The presence of XLM macros points to the Visual Basic technique.

Heuristics 3

  • ClamAV: Xls.Dropper.Agent-8803157-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Xls.Dropper.Agent-8803157-0
  • 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.