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

Static analysis result for SHA-256 f0722ced4d3e3a6e…

MALICIOUS

Office (OLE) / .XLSX

181.0 KB Created: 2020-10-13 20:45:26 Authoring application: Microsoft Excel
MD5: c25634a80543bfd699d65268394833d1 SHA-1: 8e733809ef6cad157e4091bc7c0c45dc6dc38444 SHA-256: f0722ced4d3e3a6e938aab58efaf8c311cb86f9761aaf4db00eef9b4641e067d
60 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic

The sample is an Excel file containing encrypted Excel 4.0 macros, indicated by the OLE_XLM_ENCRYPTED_MACROSHEET heuristic. The presence of an AUTOOPEN macro further suggests that malicious code is intended to execute automatically when the file is opened. Due to the encrypted nature of the macros, the specific payload and execution flow could not be determined.

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.